Method and system for calculating transmission channel sending and receiving end local grid adequacy evaluation index

Abstract

The application discloses a kind of transmission channel sending and receiving end local power grid adequacy evaluation index calculation method and system, and the application is according to local power grid model, the unit information provided by AGC, the unit information reported by power plant, calculates the unit active up and down spare of sending and receiving end local power grid, and further calculates the adequacy evaluation index of current sending and receiving end local power grid, according to the adequacy evaluation index of current sending and receiving end local power grid, power grid current operation mode and short-term / ultrashort-term plan data, the adequacy evaluation index of sending and receiving end local power grid in future period is calculated, for dispatching operation personnel reasonable arrangement sending and receiving end local power grid power supply of transmission channel sending and receiving end local power grid provides technical support.

Description

Technical Field

[0001] This invention relates to a method and system for calculating the adequacy evaluation index of the local power grid at the sending and receiving ends of a power transmission channel, belonging to the field of power system dispatch automation. Background Technology

[0002] With the rapid development of my country's ultra-high-voltage AC / DC power grid and the continuous growth of installed capacity of new energy power generation such as wind and solar power, situations frequently arise where the power flow of the sending-end local power grid is obstructed during periods of high new energy generation, and the receiving-end local power grid experiences power shortages during peak load periods. Especially during ultra-high-voltage DC power grid shutdowns, the power generation and consumption adequacy of local power grids decreases significantly, the difficulty of supply and demand balance scheduling increases markedly, and the risk to power grid safety operation grows daily. Existing power grid adequacy evaluation methods mainly focus on the overall power grid, lacking evaluation indicators for the current and future adequacy of local power grids at both the sending and receiving ends of transmission channels. Summary of the Invention

[0003] This invention provides a method and system for calculating the adequacy evaluation index of the local power grid at the sending and receiving ends of a power transmission channel, which solves the problems disclosed in the background art.

[0004] To solve the above-mentioned technical problems, the technical solution adopted by the present invention is as follows:

[0005] The calculation method for the adequacy evaluation index of the local power grid at the sending and receiving ends of the transmission channel includes:

[0006] Based on the power grid model, current power grid operation data, and power grid transmission channel information, obtain the sending-end local power grid model and the receiving-end local power grid model;

[0007] Based on the sending-end local power grid model, the receiving-end local power grid model, the unit information provided by the sending-end local power grid AGC, the unit information provided by the receiving-end local power grid AGC, the unit information reported by the power plants in the sending-end local power grid, and the unit information reported by the power plants in the receiving-end local power grid, the active power reserve of the units in the sending-end local power grid and the active power reserve of the units in the receiving-end local power grid are calculated.

[0008] Based on the active power reserve of the units in the sending-end local power grid, the active power reserve of the units in the receiving-end local power grid, the current power of the power grid transmission channel, and the maximum transmission capacity of the power grid transmission channel, calculate the adequacy evaluation index of the current sending-end local power grid and the current adequacy evaluation index of the current receiving-end local power grid.

[0009] Based on the current sufficiency evaluation indicators of the sending-end local power grid, the current sufficiency evaluation indicators of the receiving-end local power grid, the current power grid operation mode, and short-term / ultra-short-term plan data, calculate the sufficiency evaluation indicators of the sending-end local power grid and the receiving-end local power grid for a future period of time.

[0010] The generating unit information provided by the sending-end local grid AGC includes the maximum and minimum technical output of the generating units provided by the sending-end local grid AGC; the generating unit information reported by the power plants in the sending-end local grid includes the maximum and minimum output of the generating units reported by the power plants in the sending-end local grid.

[0011] The formula for calculating the active power reserve of generating units in the sending-end local power grid is:

[0012] ;

[0013] in, For active power reserve of the units in the local power grid at the sending end. For the active power reserve of the generating units in the sending-end local power grid, N is the total number of generating units in the sending-end local power grid. The upper limit of active power for the i-th generating unit provided for the local power grid model at the sending end. The lower limit of active power of the i-th generating unit provided for the sending-end local power grid model. The maximum technical output of the i-th generating unit provided by the AGC of the local power grid at the sending end. The minimum technical output of the i-th generating unit provided by the AGC of the local power grid at the sending end. The maximum output of the i-th generating unit reported by the power plant in the local power grid at the sending end. The minimum output of the i-th generating unit reported by the power plant in the local power grid at the sending end. The current active power output of the i-th generating unit in the local power grid at the sending end.

[0014] The unit information provided by the receiving-end local grid AGC includes the maximum technical output and minimum technical output of the units provided by the receiving-end local grid AGC; the unit information reported by the power plants in the receiving-end local grid includes the maximum output and minimum output of the units reported by the power plants in the receiving-end local grid.

[0015] The formula for calculating the active power reserve of the receiving-end local power grid is as follows:

[0016] ;

[0017] in, For active power reserve of the units in the local power grid at the receiving end, For the active power reserve of the units in the receiving-end local power grid, M is the total number of units in the receiving-end local power grid. The active power limit of the j-th generating unit provided for the receiving-end local power grid model. The lower limit of active power of the j-th generating unit provided for the receiving-end local power grid model. The maximum technical output of the j-th generating unit provided by the AGC of the local power grid at the receiving end. The minimum technical output of the j-th generating unit provided by the AGC of the local power grid at the receiving end. The maximum output of the j-th generating unit reported by the power plant in the local power grid at the receiving end. This refers to the minimum output of the j-th generating unit reported by the local power grid plant at the receiving end. The current active power output of the j-th generating unit in the local power grid at the receiving end.

[0018] The current adequacy evaluation indicators for the sending-end local power grid include the current idle capacity of the sending-end local power grid. Current local power grid absorption capacity at the sending end The current maximum transmission demand of the local power grid at the sending end. and the current minimum transmission demand of the local power grid at the sending end ;

[0019] The current formula for calculating the adequacy evaluation index of the local power grid at the sending end is:

[0020] ;

[0021] in, For active power reserve of the units in the local power grid at the sending end. For the active power reserve of the units in the local power grid at the sending end. This represents the current power of the power grid transmission channels. This represents the maximum transmission capacity of the power grid transmission channels.

[0022] The current adequacy evaluation indicators for the receiving-end local power grid include the current reserve capacity under the current receiving-end local power grid. and the current reserve capacity of the receiving-end power grid ;

[0023] The current formula for calculating the sufficiency evaluation index of the local power grid at the receiving end is as follows:

[0024] ;

[0025] in, For active power reserve of the units in the local power grid at the receiving end, For the active power reserve of the units in the local power grid at the receiving end, This represents the current power of the power grid transmission channels. This represents the maximum transmission capacity of the power grid transmission channels.

[0026] Based on the current sufficiency evaluation indicators of the sending-end local power grid, the current sufficiency evaluation indicators of the receiving-end local power grid, the current power grid operation mode, and short-term / ultra-short-term plan data, calculate the sufficiency evaluation indicators of the sending-end local power grid and the receiving-end local power grid for a future period, including:

[0027] Based on the current operation mode of the power grid and short-term / ultra-short-term plan data, calculate the changes in power generation and load of the sending-end local power grid and the changes in power generation and load of the receiving-end local power grid in the future period.

[0028] Based on the current sufficiency evaluation indicators of the sending-end local power grid, the current sufficiency evaluation indicators of the receiving-end local power grid, the changes in power generation and load of the sending-end local power grid in the future, and the changes in power generation and load of the receiving-end local power grid in the future, calculate the sufficiency evaluation indicators of the sending-end local power grid and the receiving-end local power grid in the future.

[0029] The adequacy evaluation indicators for the sending-end local power grid in the future include the stationary capacity of the sending-end local power grid in the future. The capacity of the local power grid at the sending end to absorb power in the near future The maximum transmission demand of the local power grid at the sending end in the near future. and the minimum transmission demand of the local power grid at the sending end in the near future ;

[0030] The formula for calculating the adequacy evaluation index of the local power grid at the sending end in the near future is as follows:

[0031] ;

[0032] in, This represents the current local grid capacity at the sending end. For the current local power grid absorption capacity at the sending end, To meet the maximum transmission demand of the local power grid at the sending end, To meet the minimum transmission demand of the local power grid at the sending end, For the future generation capacity of the local power grid at the sending end, This represents the current power generation capacity of the local power grid at the sending end. This represents the change in power generation in the local power grid at the sending end over a future period. For the load power of the local power grid at the sending end in the future, This represents the current load power of the local power grid at the sending end. This represents the load change of the local power grid at the sending end over a future period.

[0033] The adequacy evaluation indicators for the receiving-end local power grid in the future include the reserve capacity under the receiving-end local power grid in the future. and the positive reserve capacity of the receiving-end power grid in the near future ;

[0034] ;

[0035] in, This refers to the current reserve capacity under the local power grid at the receiving end, which is currently experiencing disruptions. This represents the current reserve capacity of the receiving-end power grid.

[0036] This represents the power generation capacity of the receiving-end local power grid in the future. This represents the current power generation capacity of the local power grid at the receiving end. This represents the change in power generation in the receiving-end local power grid over a future period of time. This represents the load power of the receiving-end local power grid in the future. This represents the current load power of the local power grid at the receiving end. This represents the load change of the local power grid at the receiving end over a future period of time.

[0037] A system for calculating the adequacy evaluation index of the local power grid at the sending and receiving ends of a power transmission channel includes:

[0038] The model module obtains the sending-end local power grid model and the receiving-end local power grid model based on the power grid model, current power grid operation data, and power grid transmission channel information;

[0039] The active power reserve module calculates the active power reserve of the units in the sending-end local power grid and the receiving-end local power grid based on the local power grid model at the sending end, the local power grid model at the receiving end, the unit information provided by the AGC of the sending-end local power grid, the unit information reported by the power plants in the sending-end local power grid, and the unit information reported by the power plants in the receiving-end local power grid.

[0040] The current indicator module calculates the adequacy evaluation indicators of the current sending-end local power grid and the current receiving-end local power grid based on the active power reserve of the units in the sending-end local power grid, the active power reserve of the units in the receiving-end local power grid, the current power of the power grid transmission channel, and the maximum transmission capacity of the power grid transmission channel.

[0041] The future indicators module calculates the sufficiency evaluation indicators of the sending-end local power grid and the receiving-end local power grid for a future period of time, based on the current sufficiency evaluation indicators of the sending-end local power grid, the current power grid operation mode, and short-term / ultra-short-term plan data.

[0042] A computer-readable storage medium storing one or more programs, the one or more programs including instructions that, when executed by a computing device, cause the computing device to perform a method for calculating the adequacy evaluation index of the local power grid at the transmitting and receiving ends of a transmission channel.

[0043] The beneficial effects achieved by this invention are as follows: Based on the local power grid model, the unit information provided by AGC, and the unit information reported by the power plant, this invention calculates the active power reserve of the units in the local power grid at the sending and receiving ends. Furthermore, it calculates the current adequacy evaluation index of the local power grid at the sending and receiving ends. Based on the current adequacy evaluation index of the local power grid at the sending and receiving ends, the current operation mode of the power grid, and short-term / ultra-short-term plan data, it calculates the adequacy evaluation index of the local power grid at the sending and receiving ends for a future period of time, providing technical support for dispatching and operation personnel to rationally arrange the power generation and consumption of the local power grid at the sending and receiving ends of the transmission channel. Attached Figure Description

[0044] Figure 1 A flowchart illustrating the calculation method for the adequacy evaluation index of the local power grid at the sending and receiving ends of a power transmission channel. Detailed Implementation

[0045] The present invention will be further described below with reference to the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present invention, and should not be used to limit the scope of protection of the present invention.

[0046] like Figure 1 As shown, the method for calculating the adequacy evaluation index of the local power grid at the sending and receiving ends of the transmission channel includes the following steps:

[0047] Step 1: Based on the power grid model, current power grid operation data, and power grid transmission channel information, obtain the sending-end local power grid model and the receiving-end local power grid model.

[0048] Step 2: Based on the sending-end local power grid model, the receiving-end local power grid model, the unit information provided by the sending-end local power grid AGC, the receiving-end local power grid AGC, the unit information reported by the power plants in the sending-end local power grid, and the unit information reported by the power plants in the receiving-end local power grid, calculate the active power reserve of the units in the sending-end local power grid and the active power reserve of the units in the receiving-end local power grid.

[0049] Step 3: Based on the active power reserve of the sending-end local power grid units, the active power reserve of the receiving-end local power grid units, the current power of the power grid transmission channel, and the maximum transmission capacity of the power grid transmission channel, calculate the adequacy evaluation index of the current sending-end local power grid and the current adequacy evaluation index of the current receiving-end local power grid.

[0050] Step 4: Based on the current sufficiency evaluation indicators of the sending-end local power grid, the current sufficiency evaluation indicators of the receiving-end local power grid, the current power grid operation mode, and short-term / ultra-short-term plan data, calculate the sufficiency evaluation indicators of the sending-end local power grid and the receiving-end local power grid for a future period of time.

[0051] The above method calculates the active power reserve of the local power grid at the sending and receiving ends based on the local power grid model, the unit information provided by AGC, and the unit information reported by the power plants. It then calculates the current adequacy evaluation index of the local power grid at the sending and receiving ends. Based on the current adequacy evaluation index of the local power grid at the sending and receiving ends, the current power grid operation mode, and short-term / ultra-short-term plan data, it calculates the adequacy evaluation index of the local power grid at the sending and receiving ends for a certain period of time in the future. This provides technical support for dispatching and operation personnel to rationally arrange the power generation and consumption of the local power grid at the sending and receiving ends of the transmission channel.

[0052] In the above method, topology analysis can be performed on the power grid model, the current operation data of the power grid, and the power transmission channel information to obtain the sending-end local power grid model and the receiving-end local power grid model. Here, the main purpose is to obtain the upper and lower limits of active power of the units provided by the power grid model, that is, the upper and lower limits of active power of the units in the sending-end local power grid and the upper and lower limits of active power of the units in the receiving-end local power grid.

[0053] The unit information provided by the sending-end local grid AGC includes the maximum and minimum technical output of the units provided by the sending-end local grid AGC. The unit information reported by the power plants in the sending-end local grid includes the maximum and minimum output of the units reported by the power plants in the sending-end local grid.

[0054] Therefore, the active power reserve of the sending-end local power grid units can be calculated based on the upper and lower limits of active power of the units, the maximum and minimum technical output of the units provided by the AGC of the sending-end local power grid, the maximum and minimum output of the units reported by the power plants in the sending-end local power grid, and the current active power output of the units in the sending-end local power grid. This can be expressed by the following formula:

[0055] ;

[0056] in, For active power reserve of the units in the local power grid at the sending end. For the active power reserve of the generating units in the sending-end local power grid, N is the total number of generating units in the sending-end local power grid. The upper limit of active power for the i-th generating unit provided for the local power grid model at the sending end. The lower limit of active power of the i-th generating unit provided for the sending-end local power grid model. The maximum technical output of the i-th generating unit provided by the AGC of the local power grid at the sending end. The minimum technical output of the i-th generating unit provided by the AGC of the local power grid at the sending end. The maximum output of the i-th generating unit reported by the power plant in the local power grid at the sending end. The minimum output of the i-th generating unit reported by the power plant in the local power grid at the sending end. The current active power output of the i-th generating unit in the local power grid at the sending end.

[0057] Similarly, the unit information provided by the receiving-end local grid AGC includes the maximum and minimum technical output of the units provided by the receiving-end local grid AGC, and the unit information reported by the receiving-end local grid power plants includes the maximum and minimum output of the units reported by the receiving-end local grid power plants.

[0058] Therefore, the active power reserve of the receiving-end local power grid units can be calculated based on the upper and lower limits of active power of the units, the maximum and minimum technical output of the units provided by the AGC of the receiving-end local power grid, the maximum and minimum output of the units reported by the power plants in the receiving-end local power grid, and the current active power output of the units in the receiving-end local power grid. This can be expressed by the following formula:

[0059] ;

[0060] in, For active power reserve of the units in the local power grid at the receiving end, For the active power reserve of the units in the receiving-end local power grid, M is the total number of units in the receiving-end local power grid. The active power limit of the j-th generating unit provided for the receiving-end local power grid model. The lower limit of active power of the j-th generating unit provided for the receiving-end local power grid model. The maximum technical output of the j-th generating unit provided by the AGC of the local power grid at the receiving end. The minimum technical output of the j-th generating unit provided by the AGC of the local power grid at the receiving end. The maximum output of the j-th generating unit reported by the power plant in the local power grid at the receiving end. This refers to the minimum output of the j-th generating unit reported by the local power grid plant at the receiving end. The current active power output of the j-th generating unit in the local power grid at the receiving end.

[0061] Furthermore, the adequacy evaluation index of the current sending-end local power grid can be calculated based on the active power reserve of the generating units, the current power of the power grid transmission channels, and the maximum transmission capacity; the adequacy evaluation index of the current receiving-end local power grid can also be calculated based on the active power reserve of the generating units, the current power of the power grid transmission channels, and the maximum transmission capacity.

[0062] The current adequacy evaluation indicators for the sending-end local power grid include indicators reflecting the current surplus power situation of the sending-end local power grid, indicators reflecting the current renewable energy absorption capacity of the sending-end local power grid, and indicators reflecting the current power transmission demand of the sending-end local power grid. Specifically, these include: the current surplus power capacity of the sending-end local power grid. Current local power grid absorption capacity at the sending end The current maximum transmission demand of the local power grid at the sending end. and the current minimum transmission demand of the local power grid at the sending end ;

[0063] The calculation formula can be expressed as:

[0064] ;

[0065] The current adequacy evaluation indicators for the receiving-end local power grid include indicators reflecting the current reserve constraints under the current power output of the receiving-end local power grid units, and indicators reflecting the current load increment potential of the receiving-end local power grid. Specifically, these include: the current reserve capacity under the current receiving-end local power grid conditions. and the current reserve capacity of the receiving-end power grid ;

[0066] The calculation formula can be expressed as:

[0067] ;

[0068] in, This represents the current power of the power grid transmission channels. This represents the maximum transmission capacity of the power grid transmission channels.

[0069] After obtaining the current sufficiency evaluation indicators of the local power grids at both the sending and receiving ends, the changes in power generation and load of the local power grids at both the sending and receiving ends can be calculated based on the current operating mode and short-term / ultra-short-term plan data over a future period. Then, based on the current sufficiency evaluation indicators of the local power grids at both the sending and receiving ends and the changes in power generation and load of the local power grids at both the sending and receiving ends, the sufficiency evaluation indicators of the local power grids at both the sending and receiving ends can be calculated over a future period.

[0070] Similar to current indicators, the adequacy assessment indicators for the sending-end local power grid in the future include the stationary capacity of the sending-end local power grid in the future. The capacity of the local power grid at the sending end to absorb power in the near future The maximum transmission demand of the local power grid at the sending end in the near future. and the minimum transmission demand of the local power grid at the sending end in the near future The specific formula can be expressed as:

[0071] ;

[0072] The adequacy evaluation indicators for the receiving-end local power grid in the future include the reserve capacity under the receiving-end local power grid in the future. and the positive reserve capacity of the receiving-end power grid in the near future The specific formula can be expressed as:

[0073] ;

[0074] in, For the future generation capacity of the local power grid at the sending end, This represents the current power generation capacity of the local power grid at the sending end. This represents the change in power generation in the local power grid at the sending end over a future period. For the load power of the local power grid at the sending end in the future, This represents the current load power of the local power grid at the sending end. This represents the load change of the local power grid at the sending end over a future period.

[0075] After obtaining the above indicators, the adequacy of the local power grid at the sending end and the local power grid at the receiving end can be further evaluated. Based on the evaluation results, power generation and consumption plans for the local power grid at the sending end and the local power grid at the receiving end of the transmission channel can be formulated.

[0076] The above method realizes the calculation method of the adequacy evaluation index of the local power grid at the sending and receiving ends of the transmission channel. It can quickly assess the adequacy indicators such as the power shortage, renewable energy acceptance capacity, and transmission capacity of the local power grid at the sending and receiving ends of the transmission channel in the current and future period, and provide technical support for dispatching and operation personnel to rationally arrange the power generation and consumption of the local power grid at the sending and receiving ends of the transmission channel.

[0077] Based on the same technical solution, this invention also discloses a software system for the above method, a system for calculating the adequacy evaluation index of the local power grid at the transmitting and receiving ends of a power transmission channel, comprising:

[0078] The model module obtains the sending-end local power grid model and the receiving-end local power grid model based on the power grid model, current power grid operation data, and power grid transmission channel information.

[0079] The active power reserve module calculates the active power reserve of the units in the sending-end local power grid and the receiving-end local power grid based on the local power grid model at the sending end, the local power grid model at the receiving end, the unit information provided by the AGC of the sending-end local power grid, the unit information reported by the power plants in the sending-end local power grid, and the unit information reported by the power plants in the receiving-end local power grid.

[0080] The current indicator module calculates the adequacy evaluation indicators of the current sending-end local power grid and the current receiving-end local power grid based on the active power reserve of the units in the sending-end local power grid, the active power reserve of the units in the receiving-end local power grid, the current power of the power grid transmission channel, and the maximum transmission capacity of the power grid transmission channel.

[0081] The future indicators module calculates the sufficiency evaluation indicators of the sending-end local power grid and the receiving-end local power grid for a future period of time, based on the current sufficiency evaluation indicators of the sending-end local power grid, the current power grid operation mode, and short-term / ultra-short-term plan data.

[0082] The data processing flow and methods of each module in the above system are consistent, and will not be described again here.

[0083] Based on the same technical solution, the present invention also discloses a computer-readable storage medium storing one or more programs, wherein the one or more programs include instructions that, when executed by a computing device, cause the computing device to perform a method for calculating the adequacy evaluation index of the local power grid at the transmitting and receiving ends of a power transmission channel.

[0084] Based on the same technical solution, the present invention also discloses a computing device, including one or more processors, one or more memories, and one or more programs, wherein the one or more programs are stored in the one or more memories and configured to be executed by the one or more processors, and the one or more programs include instructions for executing a method for calculating the adequacy evaluation index of the local power grid at the sending and receiving ends of the transmission channel.

[0085] Those skilled in the art will understand that embodiments of the present invention can be provided as methods, systems, or computer program products. Therefore, the present invention can take the form of a completely hardware embodiment, a completely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, the present invention can take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, etc.) containing computer-usable program code.

[0086] This invention is described with reference to flowchart illustrations and / or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the invention. It will be understood that each block of the flowchart illustrations and / or block diagrams, and combinations of blocks in the flowchart illustrations and / or block diagrams, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, special-purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, generate instructions for implementing the flowchart illustrations and / or block diagrams. Figure 1 One or more processes and / or boxes Figure 1 A device that provides the functions specified in one or more boxes.

[0087] These computer program instructions may also be stored in a computer-readable storage medium that can direct a computer or other programmable data processing device to function in a particular manner, such that the instructions stored in the computer-readable storage medium produce an article of manufacture including instruction means, which are implemented in a process Figure 1 One or more processes and / or boxes Figure 1 The function specified in one or more boxes.

[0088] These computer program instructions may also be loaded onto a computer or other programmable data processing equipment to cause a series of operational steps to be performed on the computer or other programmable equipment to produce a computer-implemented process, thereby providing instructions that execute on the computer or other programmable equipment for implementing the process. Figure 1 One or more processes and / or boxes Figure 1 The steps of the function specified in one or more boxes.

[0089] The above are merely embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention are included within the scope of the claims of the present invention pending approval.

Claims

1. A method for calculating an evaluation index of a local power grid at a sending or receiving end of a power transmission channel, characterized in that, include: Based on the power grid model, current power grid operation data, and power grid transmission channel information, obtain the sending-end local power grid model and the receiving-end local power grid model; Based on the sending-end local power grid model, the receiving-end local power grid model, the unit information provided by the sending-end local power grid AGC, the unit information provided by the receiving-end local power grid AGC, the unit information reported by the power plants in the sending-end local power grid, and the unit information reported by the power plants in the receiving-end local power grid, the active power reserve of the units in the sending-end local power grid and the active power reserve of the units in the receiving-end local power grid are calculated. Based on the active power reserve of the units in the sending-end local power grid, the active power reserve of the units in the receiving-end local power grid, the current power of the power grid transmission channel, and the maximum transmission capacity of the power grid transmission channel, calculate the adequacy evaluation index of the current sending-end local power grid and the current adequacy evaluation index of the current receiving-end local power grid. Based on the current sufficiency evaluation indicators of the sending-end local power grid, the current sufficiency evaluation indicators of the receiving-end local power grid, the current power grid operation mode, and short-term / ultra-short-term plan data, calculate the sufficiency evaluation indicators of the sending-end local power grid and the receiving-end local power grid for a future period of time.

2. The method of claim 1, wherein, The generating unit information provided by the sending-end local grid AGC includes the maximum and minimum technical output of the generating units provided by the sending-end local grid AGC; the generating unit information reported by the power plants in the sending-end local grid includes the maximum and minimum output of the generating units reported by the power plants in the sending-end local grid. The formula for calculating the active power reserve of generating units in the sending-end local power grid is: ； wherein, Pgi,up is the upper active power reserve of the i-th unit in the sending-end local power grid, Pgi,down is the lower active power reserve of the i-th unit in the sending-end local power grid, N is the total number of units in the sending-end local power grid, Pgi,up is the upper active power reserve of the i-th unit in the sending-end local power grid, Pgi,down is the lower active power reserve of the i-th unit in the sending-end local power grid, N is the total number of units in the sending-end local power grid, Pgi,max is the maximum technical output of the i-th unit provided by the AGC of the sending-end local power grid, Pgi,min is the minimum technical output of the i-th unit provided by the AGC of the sending-end local power grid, Pgi,max is the maximum technical output of the i-th unit provided by the AGC of the sending-end local power grid, Pgi,min is the minimum technical output of the i-th unit provided by the AGC of the sending-end local power grid, Pgi is the current active power output of the i-th unit in the sending-end local power grid.

3. The method of claim 1, wherein, The unit information provided by the receiving-end local grid AGC includes the maximum technical output and minimum technical output of the units provided by the receiving-end local grid AGC; the unit information reported by the power plants in the receiving-end local grid includes the maximum output and minimum output of the units reported by the power plants in the receiving-end local grid. The formula for calculating the active power reserve of the receiving-end local power grid is as follows: ； wherein, Pjup is the upper active power reserve of the jth unit in the receiving end local power grid, Pjdown is the lower active power reserve of the jth unit in the receiving end local power grid, and M is the total number of units in the receiving end local power grid, Pjup is the upper active power reserve of the jth unit in the receiving end local power grid, Pjdown is the lower active power reserve of the jth unit in the receiving end local power grid, and M is the total number of units in the receiving end local power grid, Pjmax is the maximum technical output of the jth unit provided by the AGC of the receiving end local power grid, Pjmin is the minimum technical output of the jth unit provided by the AGC of the receiving end local power grid, Pjmax is the maximum technical output of the jth unit provided by the AGC of the receiving end local power grid, Pjmin is the minimum technical output of the jth unit provided by the AGC of the receiving end local power grid, Pj is the current active power output of the jth unit in the receiving end local power grid.

4. The method of claim 1, wherein, The current sending terminal local power grid adequacy evaluation indexes include current sending terminal local power grid nest capacity , current sending terminal local power grid accommodation space , current sending terminal local power grid maximum transmission demand , and current sending terminal local power grid minimum transmission demand ; The current formula for calculating the adequacy evaluation index of the local power grid at the sending end is: ； wherein, is the upper reserve of the active power of the units of the sending local power grid, is the lower reserve of the active power of the units of the sending local power grid, is the current power of the power transmission channel of the power grid, is the maximum transmission capacity of the power transmission channel of the power grid.

5. The method of claim 1, wherein, The current receiving end local power grid adequacy evaluation index includes current receiving end local power grid under reserve blocked capacity and current receiving end power grid positive reserve capacity ; The current formula for calculating the sufficiency evaluation index of the local power grid at the receiving end is as follows: ； wherein, is the upper active reserve of the units of the receiving local power grid, is the lower active reserve of the units of the receiving local power grid, is the current power of the power transmission channel of the power grid, is the maximum transmission capacity of the power transmission channel of the power grid.

6. The method of claim 1, wherein, Based on the current sufficiency evaluation indicators of the sending-end local power grid, the current sufficiency evaluation indicators of the receiving-end local power grid, the current power grid operation mode, and short-term / ultra-short-term plan data, calculate the sufficiency evaluation indicators of the sending-end local power grid and the receiving-end local power grid for a future period, including: Based on the current operation mode of the power grid and short-term / ultra-short-term plan data, calculate the changes in power generation and load of the sending-end local power grid and the changes in power generation and load of the receiving-end local power grid in the future period. Based on the current sufficiency evaluation indicators of the sending-end local power grid, the current sufficiency evaluation indicators of the receiving-end local power grid, the changes in power generation and load of the sending-end local power grid in the future, and the changes in power generation and load of the receiving-end local power grid in the future, calculate the sufficiency evaluation indicators of the sending-end local power grid and the receiving-end local power grid in the future.

7. The method of claim 6, wherein the method further comprises: determining a power supply state of the power transmission channel sending terminal; and determining a power supply state of the power transmission channel receiving terminal. The evaluation indexes of the adequacy of the sending terminal local power grid in the future period of time include the nest capacity of the sending terminal local power grid in the future period of time , the accommodation space of the sending terminal local power grid in the future period of time , the maximum transmission demand of the sending terminal local power grid in the future period of time , and the minimum transmission demand of the sending terminal local power grid in the future period of time ; The formula for calculating the adequacy evaluation index of the local power grid at the sending end in the near future is as follows: ； wherein, is the current sending end local grid nest capacity, is the current sending end local grid accommodation space, is the current sending end local grid maximum transmission demand, is the current sending end local grid minimum transmission demand, is the future time period sending end local grid generation power, is the current sending end local grid generation power, is the sending end local grid generation change amount in the future period of time, is the future time period sending end local grid load power, is the current sending end local grid load power, is the sending end local grid load change amount in the future period of time.

8. The method of claim 6, wherein the method further comprises: calculating the power transmission channel sending and receiving terminal local grid adequacy evaluation index based on the power transmission channel sending and receiving terminal local grid adequacy evaluation index calculation method. The evaluation index of the adequacy of the local power grid of the receiving end in the future period of time includes the blocked capacity of the standby receiving end of the local power grid of the receiving end in the future period of time and the positive standby capacity of the receiving end power grid in the future period of time ; ； wherein, is the current receiving end local grid under reserve capacity, is the current receiving end grid positive reserve capacity, a generation power of a future period of the receiving end local power grid, a generation power of a current period of the receiving end local power grid, a generation change amount of the receiving end local power grid in a future period of time, a load power of a future period of the receiving end local power grid, a load power of a current period of the receiving end local power grid, a load change amount of the receiving end local power grid in a future period of time.

9. A system for calculating an evaluation index of a local power grid at a sending or receiving end of a power transmission channel, characterized in that, include: A model module obtains a sending-end local power grid model and a receiving-end local power grid model according to a power grid model, current operation data of the power grid, and power transmission channel information of the power grid; An active power up-and-down reserve module calculates active power up-and-down reserves of units in the sending-end local power grid and active power up-and-down reserves of units in the receiving-end local power grid according to the sending-end local power grid model, the receiving-end local power grid model, unit information provided by AGC of the sending-end local power grid, unit information provided by AGC of the receiving-end local power grid, unit information reported by a power plant in the sending-end local power grid, and unit information reported by a power plant in the receiving-end local power grid; A current index module calculates an adequacy evaluation index of a current sending-end local power grid and an adequacy evaluation index of a current receiving-end local power grid according to the active power up-and-down reserves of units in the sending-end local power grid, the active power up-and-down reserves of units in the receiving-end local power grid, current power of the power transmission channel, and maximum transmission capacity of the power transmission channel; A future index module calculates an adequacy evaluation index of a sending-end local power grid in a future period of time and an adequacy evaluation index of a receiving-end local power grid in the future period of time according to the adequacy evaluation index of the current sending-end local power grid, the adequacy evaluation index of the current receiving-end local power grid, a current operation mode of the power grid, and short-term / ultra-short-term planning data.

10. A computer-readable storage medium storing one or more programs, the one or more programs comprising instructions for: The one or more programs include instructions that, when executed by a computing device, cause the computing device to perform any of the methods of claims 1-8.

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