A state grid provincial multi-level power system collaborative dispatching operation method and device

Abstract

The application discloses a kind of national grid province multistage power system collaborative scheduling operation method and device, comprising: according to the target demand of national regulation, the target demand of network regulation, the target demand of province regulation, the load balance constraint of each level, the upper and lower limit constraint of multiple direct regulation unit output, tie-line transaction constraint, the unit output constraint of province regulation and positive and negative reserve constraint, constructs national grid province multistage power system collaborative scheduling model;Provincial equivalent aggregation node and network equivalent aggregation node are constructed to simplify the structure of national grid province multistage power system collaborative scheduling model;Based on target inter-level method, the simplified national grid province multistage power system collaborative scheduling model is solved, and the multistage power system collaborative scheduling operation result is obtained.The application belongs to the field of power system collaboration.The application improves the power system optimization scheduling solving efficiency under the whole network collaboration.

Description

Technical Field

[0001] This invention relates to the field of power system coordination, and in particular to a method and apparatus for coordinated dispatch and operation of a multi-level power system at the provincial level under the State Grid Corporation of China. Background Technology

[0002] With the advancement of new power system construction and the rapid development of renewable energy, the demand for system balance and regulation capacity is fluctuating. Due to the inverse distribution of resource endowment and energy demand, provincial and regional power surpluses / shortages occur frequently. The power system balance model is shifting from "provincial balance" to "nationwide mutual assistance." Multi-level overall planning of the power system's power balance is one of the key measures for the safe and stable operation of the power system.

[0003] There is already a large amount of research on collaborative scheduling based on mutual assistance, but current research focuses on national-grid and grid-province two-level collaborative scheduling and has not fully explored the potential for cross-province and cross-regional mutual assistance. Therefore, it is urgent to explore and construct a national-grid-province multi-level collaborative balance model to achieve optimal resource allocation that takes into account both local and global factors. Summary of the Invention

[0004] This invention provides a method and apparatus for coordinated dispatch and operation of a multi-level power system at the State Grid provincial level, which solves the technical problem of unbalanced global power resource allocation in the prior art and achieves the technical effect of balanced allocation of global power resources.

[0005] In a first aspect, the present invention provides a method for coordinated dispatch and operation of a multi-level power system at the provincial level under the State Grid Corporation of China, the method comprising:

[0006] Based on the target demand of the national dispatch, the target demand of the grid dispatch, the target demand of the provincial dispatch, the load balance constraints at each level, the upper and lower limits of the output of multiple directly dispatched units, the tie line transaction constraints, the unit output constraints of the provincial dispatch, and the positive and negative reserve constraints, a multi-level collaborative dispatch model of the State Grid provincial power system is constructed.

[0007] The structure of the State Grid provincial multi-level power system collaborative dispatch model is simplified by constructing provincial equivalent aggregation nodes and network equivalent aggregation nodes;

[0008] The simplified State Grid-Province Multi-Level Power System Co-Dispatch Model is structured with the order of National, Grid, and Province as the outer ring sequence and the order of Province, Grid, and National as the inner ring sequence. The simplified State Grid-Province Multi-Level Power System Co-Dispatch Model is solved using the objective cascading method to obtain the multi-level power system coordinated dispatch operation results.

[0009] Furthermore, the target requirement is to minimize system operating costs and transmission fees within the scope of national dispatch coordination, including:

[0010]

[0011] Among them, min F1 represents the minimum sum of system operating costs and transmission costs within the coordination scope of the national dispatch center. The system operating costs within the scope of national coordination. For inter-regional power transmission costs within the scope of national coordination, For the system operating cost of region a1, For the operating cost of the nationally dispatched thermal power unit i1 during time period t, A Regi The total number of regions within the scope of national coordination, where T is the total number of operating times per day. For the output of thermal power unit i1 within region a1 during time period t, as well as These are all coefficients of the unit operating cost function for nationally dispatched thermal power unit i1. The transmission power of the inter-regional tie line k1 during time period t. This represents the total number of inter-regional connection lines. This represents the transmission power of the inter-regional tie line k1 during time period t.

[0012] Furthermore, the objective requirement is to minimize system operating costs and transmission fees within the coordination scope of the grid dispatching system, including:

[0013]

[0014]

[0015] Among them, min F2 represents the minimum sum of system operating costs and transmission costs within the coordination scope of the grid dispatching system. The system operating costs within the coordination scope of the network dispatching, For inter-provincial power transmission fees, For the system operating costs of province a2 in the network survey, A Prov This refers to the total number of provinces within the coordination scope of the network survey. The operating cost of grid-dispatch thermal power unit i2 during time period t. as well as All of these are coefficients of the unit operating cost function for grid-dispatch thermal power unit i2. To adjust the output of thermal power unit i2 within the provincial A2 grid during time period t, For inter-provincial transmission line fees, This represents the total number of inter-provincial communication lines. This represents the transmission power of the inter-provincial connection line k2 during time period t.

[0016] Furthermore, with the target requirement being the system operating cost within the scope of the provincial survey, this includes:

[0017]

[0018] Among them, min F3 represents the minimum system operating cost of the provincial dispatch center. The system operating costs within the scope of the provincial transfer, To reduce the operating costs of thermal power unit i3 during time period t, f 2,t The penalty fee for abandoning clean energy during period t within the provincial dispatch scope, f 3,t The penalty cost for load shedding during period t within the provincial dispatch scope. The total number of thermal power units dispatched by the province. This refers to the total number of independent energy storage facilities within the provincial dispatch area a3. To reduce the charging and discharging costs of the independent energy storage es3 during time period t, as well as, All of these are the unit operating cost function coefficients for provincial-level thermal power unit i3. For the output of provincial dispatched thermal power unit i3 within the provincial dispatch range a3 during time period t, c M The penalty coefficient for abandoning clean energy. This refers to the total number of provincial-level wind turbines within the provincial dispatch range a3. The curtailment power of provincial wind turbine w3 within the provincial dispatch range a3 during time period t. This refers to the total number of photovoltaic power plants within the provincial grid's coverage area a3. c represents the curtailed power of provincial-level photovoltaic (PV) power within the provincial-level dispatch range a3 during time period t. L This is the penalty factor for loss of load. The load loss power at time t within the provincial dispatch range a3. To save on charging costs for the independent energy storage ES3, To save on the discharge costs of the independent energy storage es3, The charging power of the independent energy storage es3 within the provincial dispatch range a3 during time period t. The discharge power of the independent energy storage es3 within the provincial dispatch range a3 during time period t.

[0019] Furthermore, the load balancing constraints at each level include:

[0020]

[0021] in, The net system load for region a1 during time period t. This represents the sum of net loads across all provinces during time period t. The output of thermal power unit i2 within the regional grid a1 during time period t. For the output of hydropower unit 1 within region a1 during time period t, For the output of the hydropower unit 2 in the internal grid of region a1 during time period t, For the output of the ventilation fan W2 in the internal network of area a1 during time period t, For the output of photovoltaic power generation v2 in the intragrid of region a1 during time period t, This represents the total number of thermal power units dispatched within the regional A1 grid. This represents the total number of national-level hydropower generating units within region a1. This represents the total number of hydropower units in the internal network of region a1. This represents the total number of ventilation fans within the A1 area network. For the total number of photovoltaic power plants in the intragrid of region a1, A Regi This refers to the total number of regions within the scope of national coordination. For the positive relaxation variable of the load within region a1, For the load in the region a1, This represents the total number of inter-regional connection lines. The output of the nationally dispatched thermal power unit i1 within region a1 during time period t;

[0022] Also includes:

[0023]

[0024] in, For the net system load of province a2 in time period t, The total system load of the province in time period t. For the output of the provincial thermal power unit i3 within the province a2 during time period t, For the output of hydropower unit 2 in the provincial a2 intranet during time period t, For the output of the provincial hydropower unit 3 within province a2 during time period t, For the output of the provincial wind turbine W3 within the province A2 during time period t, For the output of provincial-level photovoltaic power generation system v3 within the province a2 during time period t, For the charging power of the independent energy storage es3 within the province a2 during time period t, The discharge power of the independent energy storage es3 within the provincial region a2 during time period t. This represents the total number of provincial-level thermal power units within province A2. This represents the total number of hydropower generating units within the provincial A2 intranet. This represents the total number of provincial hydropower generating units within region a1. This refers to the total number of provincial-level wind turbines within province A2. This represents the total number of provincial-level photovoltaic power plants within province a2. This represents the total number of independent energy storage facilities within province a2. For the positive slack variable of the load within province a2, For the inverse relaxation variable of the load within province a2, A represents the total number of inter-provincial communication lines. Prov This refers to the total number of provinces within the coordination scope of the network survey. The output of thermal power unit i2 within the provincial A2 grid during time period t;

[0025] Also includes:

[0026]

[0027] in, This indicates the output of the provincial-level hydropower unit 3 within the provincial dispatch range a3 during time period t. k,t This represents the transmission power of the inter-regional and inter-provincial connection line k within the provincial dispatch range a3 at time t. This indicates the output of the provincial wind turbine w3 within the provincial dispatch range a3 during time period t. This indicates the output of the provincial photovoltaic system (v3) within the provincial grid range (a3) ​​during time period t. This indicates the charging power of the independent energy storage system es3 within the provincial dispatch range a3 during time period t. This indicates the discharge power of the independent energy storage es3 within the provincial dispatch range a3 during time period t. N represents the number of provincial-level hydropower units within the provincial dispatch range a3; k This represents the total number of inter-regional and inter-provincial connection lines k within the provincial survey area a3. The total number of thermal power units dispatched by the province. This refers to the total number of independent energy storage facilities within the provincial dispatch area a3. This refers to the total number of provincial-level wind turbines within the provincial dispatch range a3. This refers to the total number of provincial-level wind turbines within the provincial dispatch range a3. The output of the provincial dispatched thermal power unit i3 within the provincial dispatch range a3 during time period t. This represents the total system load of the province during time period t.

[0028] Furthermore, the upper and lower limits of output for multiple direct-control units include:

[0029]

[0030] in, This indicates the proportion of power output from the nationally dispatched thermal power unit i1 to region a1, where A1 represents the total number of regions supplied by the nationally dispatched thermal power unit i1. For the output of the nationally dispatched thermal power unit i1 in region a1 during time period t, Let i1 be the minimum output of the nationally dispatched thermal power unit i1 within region a1 during time period t. The maximum output of the nationally dispatched thermal power unit i1 within region a1 during time period t;

[0031] Also includes:

[0032]

[0033] in, This indicates the percentage of power output from grid-dispatched thermal power unit i2 to province a2, where A2 represents the total number of supply areas from grid-dispatched thermal power unit i2. To adjust the output of thermal power unit i2 within the provincial A2 grid during time period t, The minimum output of grid-dispatch thermal power unit i2 during time period t. This represents the maximum output of grid-controlled thermal power unit i2 during time period t.

[0034] Furthermore, the constraints on connector transactions include:

[0035]

[0036] in, Indicates the inter-regional and inter-provincial connection line k n The transmission power at time t, Indicates the inter-regional and inter-provincial connection line k n Plan O at time t n The transmission power at the following levels Indicates the inter-regional and inter-provincial connection line k n Trade I at time t n The transmission power is as follows: when n=1, it is an inter-regional connection line; when n=2, it is an inter-provincial connection line.

[0037] Also includes:

[0038]

[0039] in, For the connecting line k n The positive correlation coefficient with the actual transaction power flow direction For transaction behavior at all levels I n The trading power at time t, A variable with values ​​between 0 and 1 represents the transaction behavior I. n Whether it is transmitted via transaction path p A variable that is 0-1 and indicates whether path p is connected by link k. n Composition, N p This represents the total number of transaction paths. For inter-regional and inter-provincial connection lines k n Trade I at time t n The transmission power below.

[0040] Furthermore, the provincial dispatch center's unit output constraints and positive and negative reserve constraints include:

[0041]

[0042]

[0043] in, This represents the maximum output of the provincial-level thermal power plant i3 during time period t. The minimum output of the provincial-level thermal power plant i3 during time period t. This refers to the national thermal power unit group. Maximum output during time period t This refers to the national thermal power unit group. Minimum output during time period t, Indicates grid-dispatch thermal power unit group Maximum output during time period t Indicates grid-dispatch thermal power unit group Minimum output during time period t, Indicates the provincial-level thermal power unit group Maximum output during time period t Provincial thermal power unit group Minimum output at time interval t, This indicates the maximum uphill speed of the nationally dispatched thermal power unit i1. This indicates the maximum downhill ramp rate of the nationally dispatched thermal power unit i1. This indicates the maximum uphill speed of the grid-dispatch thermal power unit i2. This indicates the maximum downhill / climbing rate of the grid-dispatch thermal power unit i2. This indicates the maximum uphill speed of the provincial-level thermal power unit i3. This indicates the maximum downhill / climbing rate of the provincial-level thermal power unit i3. This indicates the start / stop status of provincial thermal power unit i3 during time period t. The time indicates that the provincial thermal power unit i3 will be shut down during time period t. This indicates that the provincial thermal power unit i3 is started during time period t. This refers to the capacity of the directly dispatched hydropower unit h3 within the provincial dispatch range a3 during the time period t. This indicates the minimum output of the directly regulated hydropower unit h3 within the provincial dispatch range a3. This represents the deduction value for unstable unit output during time period t. This represents the system's positive standby capacity requirement for time period t. This represents the system's negative reserve capacity requirement for time period t. The output of the provincial dispatched thermal power unit i3 within the provincial dispatch range a3 during time period t. The output of thermal power unit i1 within the regional grid of area a1 during time period t. To adjust the output of thermal power unit i2 within the provincial A2 grid during time period t, For the output of thermal power unit i1 in the regional a1 grid during time period t-1, To adjust the output of thermal power unit i2 within the provincial A2 grid during time period t-1, The output of the provincial dispatched thermal power unit i3 within the provincial dispatch range a3 during the time period t-1.

[0044] Furthermore, based on the objective cascading method, the simplified State Grid provincial multi-level power system collaborative scheduling model is solved to obtain the multi-level power system collaborative scheduling operation results, including:

[0045] After determining the output of the provincial dispatched thermal power unit i3 within the provincial dispatch range a3 in time period t, it is determined whether the first absolute value of the reverse relaxation variable of the load in region a1 and the first absolute value of the positive relaxation variable of the load in region a1, and the second absolute value of the positive relaxation variable of the load in province a2 and the second absolute value of the negative relaxation variable of the load in province a2, all satisfy the first preset constraint condition.

[0046] If all conditions are met, the net system load of region a1 in time period t is determined; if not, the penalty coefficient of the State Grid provincial multi-level power system collaborative dispatch model is updated.

[0047] After determining the net system load of region a1 in time period t, determine whether the first absolute value and the second absolute value both satisfy the second preset constraint condition.

[0048] If satisfied, determine whether the State Grid provincial multi-level power system collaborative dispatch model satisfies the global constraints; if not satisfied, update the penalty coefficient of the State Grid provincial multi-level power system collaborative dispatch model.

[0049] If the global constraints are met, the results of the multi-level power system coordinated scheduling operation are output; otherwise, the index values ​​of the inner and outer loop structures are updated.

[0050] Secondly, the present invention provides a State Grid provincial multi-level power system collaborative dispatching and operation device, the device comprising:

[0051] The model building module is used to construct a multi-level collaborative dispatch model of the State Grid and provincial power systems based on the target demand of the national dispatch, the target demand of the grid dispatch, the target demand of the provincial dispatch, the load balance constraints at each level, the upper and lower limits of the output of multiple directly dispatched units, the tie line transaction constraints, the unit output constraints of the provincial dispatch, and the positive and negative reserve constraints.

[0052] The structural simplification module is used to construct provincial equivalent aggregation nodes and network equivalent aggregation nodes to simplify the structure of the State Grid provincial multi-level power system collaborative dispatch model;

[0053] The execution results module is used to take the order of national, grid, and province as the outer loop order of the simplified national grid provincial multi-level power system collaborative scheduling model, and the order of province, grid, and national as the inner loop order of the structure. Based on the objective cascading method, the simplified national grid provincial multi-level power system collaborative scheduling model is solved to obtain the multi-level power system collaborative scheduling execution results.

[0054] One or more technical solutions provided in this invention have at least the following technical effects or advantages:

[0055] This invention constructs a multi-level collaborative balance scheduling optimization model of the State Grid and provincial grids by taking into account the differences in hierarchical objectives and constraints, as well as the actual impact of direct-dispatch units and tie lines. This model provides guidance for subsequent exploration of multi-level collaborative scheduling methods adapted to the State Grid and provincial grids, and realizes multi-level balance scheduling.

[0056] This invention integrates equivalent aggregation and target cascading methods to construct a solution method adapted to multi-level collaborative optimization scheduling of the national grid and provincial grids. It takes into account the actual grid situation and internal mechanisms at each level, and improves the efficiency of power system optimization scheduling solution under the collaborative management of the entire grid.

[0057] This invention breaks through the limitations of existing research that ignores the fact that my country's dispatching system is actually a three-level coordinated dispatching system at the national, grid, and provincial levels, and only constructs a two-level coordinated optimization dispatching model from the perspective of two-level interconnection. In addition, the model breaks through the limitations of existing dispatching models that only consider the upper and lower limit constraints of directly dispatched units and the transmission capacity constraints of tie lines. It supplements the actual situation of "one unit sending multiple services" of directly dispatched units and the fact that tie line channels include both market and dispatching factors, and constructs a refined national-grid-provincial multi-level coordinated dispatching optimization model that takes into account the actual operation of directly dispatched units and tie lines. Attached Figure Description

[0058] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0059] Figure 1 A flowchart illustrating a collaborative dispatching and operation method for a provincial multi-level power system provided by the present invention;

[0060] Figure 2 A schematic diagram of the multi-level collaborative equilibrium solution provided by the present invention;

[0061] Figure 3 This is a schematic diagram of the inner and outer loop solution process provided by the present invention;

[0062] Figure 4 This invention provides a structural schematic diagram of a State Grid provincial multi-level power system collaborative dispatching and operation device. Detailed Implementation

[0063] This invention provides a method for the coordinated dispatch and operation of a multi-level power system at the provincial level under the State Grid Corporation of China, which solves the technical problems of existing methods for the coordinated dispatch and operation of multi-level power systems at the provincial level under the State Grid Corporation of China.

[0064] The technical solution of this invention is to solve the above-mentioned technical problems, and the overall idea is as follows:

[0065] A method for coordinated dispatch and operation of a State Grid provincial multi-level power system includes: constructing a coordinated dispatch model of the State Grid provincial multi-level power system based on the target demand of the national dispatch center, the target demand of the grid dispatch center, the target demand of the provincial dispatch center, load balance constraints at each level, upper and lower limits of output of multiple directly dispatched units, tie-line trading constraints, unit output constraints of the provincial dispatch center, and positive and negative reserve constraints; constructing provincial equivalent aggregation nodes and grid equivalent aggregation nodes to simplify the structure of the coordinated dispatch model of the State Grid provincial multi-level power system; using the order of national, grid, and province as the outer loop order of the simplified coordinated dispatch model of the State Grid provincial multi-level power system, and the order of province, grid, and national as the inner loop order of the structure; and solving the simplified coordinated dispatch model of the State Grid provincial multi-level power system based on the target cascading method to obtain the coordinated dispatch operation results of the multi-level power system.

[0066] To better understand the above technical solutions, the following will provide a detailed explanation of the technical solutions in conjunction with the accompanying drawings and specific implementation methods.

[0067] First, it should be clarified that the term "and / or" in this article is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, or B existing alone. Additionally, the character " / " in this article generally indicates that the preceding and following related objects have an "or" relationship.

[0068] Due to the inverse distribution of resource endowment and energy demand, provincial and regional power surpluses or shortages occur frequently. The power system balancing model is shifting from "provincial balancing" to "nationwide mutual assistance." Multi-level coordination of power system balance is a key measure for the safe and stable operation of the power system. Currently, two-level collaborative dispatching exists between the national grid and the grid and between provincial grids, as evidenced by patent documents CN201910520075.5 and CN201910044730.4.

[0069] The purpose of this invention is to fully explore the potential for mutual assistance across provinces and regions, achieve optimal resource allocation that takes into account both local and global factors, and explore the construction of a multi-level power system (national-grid-provincial) for coordinated and balanced operation.

[0070] This invention provides, for example Figure 1 The method for coordinated dispatch and operation of a multi-level power system of the State Grid province shown includes steps S11-S13:

[0071] Step S11: Based on the target demand of the national dispatch, the target demand of the grid dispatch, the target demand of the provincial dispatch, the load balance constraints at each level, the upper and lower limits of the output of multiple directly dispatched units, the tie line transaction constraints, the unit output constraints of the provincial dispatch, and the positive and negative reserve constraints, construct the State Grid provincial multi-level power system collaborative dispatch model.

[0072] The objective is to minimize system operating costs and transmission fees within the scope of national dispatch coordination.

[0073] The National Dispatch Center primarily formulates plans for inter-regional power line connections and the output plans for dispatched generating units, aiming to minimize system operating costs and transmission fees within the scope of the National Dispatch Center's coordination. Therefore, the National Dispatch Center's target requirements are as follows:

[0074]

[0075]

[0076] Among them, the sum of system operating costs and transmission fees within the coordination scope of the National Dispatch Center is the smallest. The system operating costs within the coordination scope of the National Dispatch Center (including the system operating costs of each region and the operating costs of thermal power units dispatched by the National Dispatch Center) For inter-regional power transmission costs within the scope of national coordination, For the system operating cost of region a1, For the operating cost of the nationally dispatched thermal power unit i1 during time period t, A Regi The total number of regions within the scope of national coordination, where T is the total number of operating times per day. For the output of thermal power unit i1 within region a1 during time period t, as well as These are all coefficients of the unit operating cost function for nationally dispatched thermal power unit i1. The transmission power of the inter-regional tie line k1 during time period t. This represents the total number of inter-regional connection lines. This represents the transmission power of the inter-regional tie line k1 during time period t.

[0077] The objective is to minimize system operating costs and transmission expenses within the coordination scope of the grid dispatching system.

[0078] The grid dispatch center primarily formulates plans for inter-provincial power line connections and grid-dispatched generating units, aiming to minimize system operating costs and transmission expenses within its dispatch area. Therefore, the grid dispatch center's objectives and requirements are as follows:

[0079]

[0080] Among them, min F2 represents the minimum sum of system operating costs and transmission costs within the coordination scope of the grid dispatching system. The system operating costs within the coordination scope of the grid dispatching system (including the system operating costs of each province within the region and the operating costs of the grid dispatching thermal power units) For inter-provincial power transmission fees, For the system operating costs of province a2 in the network survey, A Prov This refers to the total number of provinces within the coordination scope of the network survey. The operating cost of grid-dispatch thermal power unit i2 during time period t. as well as All of these are coefficients of the unit operating cost function for grid-dispatch thermal power unit i2. To adjust the output of thermal power unit i2 within the provincial A2 grid during time period t, For inter-provincial transmission line fees, This represents the total number of inter-provincial communication lines. This represents the transmission power of the inter-provincial connection line k2 during time period t.

[0081] [The target demand is the system operating cost within the scope of the provincial survey]

[0082] The provincial dispatch center primarily formulates power output plans for provincial dispatch units, with the target being the system operating cost within the province. Therefore, the target requirements of the provincial dispatch center include:

[0083]

[0084] Among them, min F3 represents the minimum system operating cost of the provincial dispatch center. The system operating costs within the scope of the provincial transfer, To reduce the operating costs of thermal power unit i3 during time period t, f 2,t The penalty fee for abandoning clean energy during period t within the provincial dispatch scope, f 3,t The penalty cost for load shedding during period t within the provincial dispatch scope. The total number of thermal power units dispatched by the province. This refers to the total number of independent energy storage facilities within the provincial dispatch area a3. To reduce the charging and discharging costs of the independent energy storage es3 during time period t, as well as, All of these are the unit operating cost function coefficients for provincial-level thermal power unit i3. For the output of provincial dispatched thermal power unit i3 within the provincial dispatch range a3 during time period t, c M The penalty coefficient for abandoning clean energy. This refers to the total number of provincial-level wind turbines within the provincial dispatch range a3. The curtailment power of provincial wind turbine w3 within the provincial dispatch range a3 during time period t. This refers to the total number of photovoltaic power plants within the provincial grid's coverage area a3. c represents the curtailed power of provincial-level photovoltaic (PV) power within the provincial-level dispatch range a3 during time period t. L This is the penalty factor for loss of load. The load loss power at time t within the provincial dispatch range a3. To save on charging costs for the independent energy storage ES3, To save on the discharge costs of the independent energy storage es3, The charging power of the independent energy storage es3 within the provincial dispatch range a3 during time period t. The discharge power of the independent energy storage es3 within the provincial dispatch range a3 during time period t.

[0085] The constraints include load balance constraints for each level of the system, upper and lower limits of unit output constraints, inter-regional and inter-provincial tie line transaction constraints, unit output constraints of the provincial dispatch center, and positive and negative reserve constraints.

[0086] Load balancing constraints at each system level

[0087] For each time period t, the load balancing constraints at the national, regional, and provincial dispatch levels can include:

[0088]

[0089] in, The net system load for region a1 during time period t. This represents the sum of net loads across all provinces during time period t. The output of thermal power unit i2 within the regional grid a1 during time period t. For the output of hydropower unit 1 within region a1 during time period t, For the output of the hydropower unit 2 in the internal grid of region a1 during time period t, For the output of the ventilation fan W2 in the internal network of area a1 during time period t, For the output of photovoltaic power generation v2 in the intragrid of region a1 during time period t, This represents the total number of thermal power units dispatched within the regional A1 grid. This represents the total number of national-level hydropower generating units within region a1. This represents the total number of hydropower units in the internal network of region a1. This represents the total number of ventilation fans within the A1 area network. For the total number of photovoltaic power plants in the intragrid of region a1, A Regi This refers to the total number of regions within the scope of national coordination. For region a q Positive relaxation variables of internal load, For region a q Internal load reverse relaxation variable, This represents the total number of inter-regional connection lines. For region a q Internal network control of thermal power units i q The output during time period t;

[0090] Also includes:

[0091]

[0092]

[0093] in, For the net system load of province a2 in time period t, The total system load of the province in time period t. For the output of the provincial thermal power unit i3 within the province a2 during time period t, For the output of hydropower unit 2 in the provincial a2 intranet during time period t, For the output of the provincial hydropower unit 3 within province a2 during time period t, For the output of the provincial wind turbine W3 within the province A2 during time period t, For the output of provincial-level photovoltaic power generation system v3 within the province a2 during time period t, For the charging power of the independent energy storage es3 within the province a2 during time period t, The discharge power of the independent energy storage es3 within the provincial region a2 during time period t. This represents the total number of provincial-level thermal power units within province A2. This represents the total number of hydropower generating units within the provincial A2 intranet. This represents the total number of provincial hydropower generating units within region a1. This refers to the total number of provincial-level wind turbines within province A2. This represents the total number of provincial-level photovoltaic power plants within province a2. This represents the total number of independent energy storage facilities within province a2. For the positive slack variable of the load within province a2, For the inverse relaxation variable of the load within province a2, A represents the total number of inter-provincial communication lines. Prov This refers to the total number of provinces within the coordination scope of the network survey. The output of thermal power unit i2 within the provincial A2 grid during time period t;

[0094] Also includes:

[0095]

[0096] in, This indicates the output of the provincial-level hydropower unit 3 within the provincial dispatch range a3 during time period t. k,t This represents the transmission power of the inter-regional and inter-provincial connection line k within the provincial dispatch range a3 at time t. This indicates the output of the provincial wind turbine w3 within the provincial dispatch range a3 during time period t. This indicates the output of the provincial photovoltaic system (v3) within the provincial grid range (a3) ​​during time period t. This indicates the charging power of the independent energy storage system es3 within the provincial dispatch range a3 during time period t. This indicates the discharge power of the independent energy storage es3 within the provincial dispatch range a3 during time period t. N represents the number of provincial-level hydropower units within the provincial dispatch range a3; kThis represents the total number of inter-regional and inter-provincial connection lines k within the provincial survey area a3. The total number of thermal power units dispatched by the province. This refers to the total number of independent energy storage facilities within the provincial dispatch area a3. This refers to the total number of provincial-level wind turbines within the provincial dispatch range a3. This refers to the total number of provincial-level wind turbines within the provincial dispatch range a3. The output of the provincial dispatched thermal power unit i3 within the provincial dispatch range a3 during time period t. This represents the total system load of the province during time period t.

[0097] [Multiple Direct-Control Unit Output Upper and Lower Limit Constraints]

[0098] In actual dispatching operations, the National Dispatch Center (NDC) needs to dispatch a single generating unit to supply multiple regions (the same applies to grid-dispatched units). Based on the unit capacity share, the upper and lower limits of the output of directly dispatched generating units at the NDC and grid-dispatched levels can be described as follows:

[0099]

[0100] in, This indicates the proportion of power output from the nationally dispatched thermal power unit i1 to region a1, where A1 represents the total number of regions supplied by the nationally dispatched thermal power unit i1. For the output of the nationally dispatched thermal power unit i1 in region a1 during time period t, Let i1 be the minimum output of the nationally dispatched thermal power unit i1 within region a1 during time period t. The maximum output of the nationally dispatched thermal power unit i1 within region a1 during time period t;

[0101] Also includes:

[0102]

[0103] in, This indicates the percentage of power output from grid-dispatched thermal power unit i2 to province a2, where A2 represents the total number of supply areas from grid-dispatched thermal power unit i2. To adjust the output of thermal power unit i2 within the provincial A2 grid during time period t, The minimum output of grid-dispatch thermal power unit i2 during time period t. This represents the maximum output of grid-controlled thermal power unit i2 during time period t.

[0104] [Connection Line Transaction Restrictions]

[0105] In the national-grid-provincial multi-level collaborative dispatch model, inter-regional and inter-provincial interconnection lines, as important objects of inter-regional interactive transmission, are a crucial means of coupling power balance with inter-provincial and intra-provincial markets to optimize resource allocation. Specifically, the overall planning of inter-regional and inter-provincial interconnection lines is subject to the dual constraints of power trading contracts and transmission capacity, and the security of network transmission must be guaranteed.

[0106]

[0107] in, Indicates the inter-regional and inter-provincial connection line k n The transmission power at time t, Indicates the inter-regional and inter-provincial connection line k n Plan O at time t n The transmission power at the following levels Indicates the inter-regional and inter-provincial connection line k n Trade I at time t n The transmission power is as follows: when n=1, it is an inter-regional connection line; when n=2, it is an inter-provincial connection line.

[0108] Electricity trading and tie lines are indirectly related. Specifically, buyers and sellers in inter-regional and inter-provincial markets conduct transactions through trading paths, which are formed by combinations of corresponding tie lines. Solving for the power relationship between electricity trading and tie lines requires decomposing the trading power onto the tie lines based on the specific trading path. It also requires considering the positive direction definition of the tie lines and the power flow direction between buyers and sellers. Therefore, it also includes:

[0109]

[0110] in, For the connecting line k n The positive correlation coefficient with the actual transaction power flow direction For transaction behavior at all levels I n The trading power at time t, A variable with values ​​between 0 and 1 represents the transaction behavior I. n Whether it is transmitted via transaction path p A variable that is 0-1 and indicates whether path p is connected by link k. n Composition, N p This represents the total number of transaction paths. For inter-regional and inter-provincial connection lines k n Trade I at time t n The transmission power below.

[0111] [Power output constraints and positive / negative reserve constraints of provincial dispatching units]

[0112]

[0113]

[0114]

[0115] in, This represents the maximum output of the provincial-level thermal power plant i3 during time period t. The minimum output of the provincial-level thermal power plant i3 during time period t. This refers to the national thermal power unit group. Maximum output during time period t This refers to the national thermal power unit group. Minimum output at time interval t, Indicates grid-dispatch thermal power unit group Maximum output during time period t Indicates grid-dispatch thermal power unit group Minimum output at time interval t, Indicates the provincial-level thermal power unit group Maximum output during time period t Provincial thermal power unit group Minimum output at time interval t, This indicates the maximum uphill speed of the nationally dispatched thermal power unit i1. This indicates the maximum downhill ramp rate of the nationally dispatched thermal power unit i1. This indicates the maximum uphill speed of the grid-dispatch thermal power unit i2. This indicates the maximum downhill / climbing rate of the grid-dispatch thermal power unit i2. This indicates the maximum uphill speed of the provincial-level thermal power unit i3. This indicates the maximum downhill / climbing rate of the provincial-level thermal power unit i3. This indicates the start / stop status of provincial thermal power unit i3 during time period t. The time indicates that the provincial thermal power unit i3 will be shut down during time period t. This indicates that the provincial thermal power unit i3 is started during time period t. This refers to the capacity of the directly dispatched hydropower unit h3 within the provincial dispatch range a3 during the time period t. This indicates the minimum output of the directly regulated hydropower unit h3 within the provincial dispatch range a3. This represents the deduction value for unstable unit output during time period t. This represents the system's positive standby capacity requirement for time period t. This represents the system's negative reserve capacity requirement for time period t. The output of the provincial dispatched thermal power unit i3 within the provincial dispatch range a3 during time period t. The output of thermal power unit i1 within the regional grid of area a1 during time period t. To adjust the output of thermal power unit i2 within the provincial A2 grid during time period t, For the output of thermal power unit i1 in the regional a1 grid during time period t-1, To adjust the output of thermal power unit i2 within the provincial A2 grid during time period t-1, The output of the provincial dispatched thermal power unit i3 within the provincial dispatch range a3 during the time period t-1.

[0116] In step S11, the following parameters are used as boundary conditions: provincial load level characteristics, wind and solar power output characteristics, various power source parameters; regional direct dispatch unit parameters, inter-provincial tie line parameters; national direct dispatch unit parameters, and inter-regional tie line parameters. The objective functions are to minimize the system operating cost and transmission cost at the national dispatch level, the system operating cost and transmission cost at the grid dispatch level, and the system operating cost at the provincial dispatch level, respectively. Considering the load balance constraints of each level of system, the upper and lower limits of unit output for "one unit transmitting multiple times", and the transaction constraints of inter-regional and inter-provincial tie lines, the unit output data and tie line transmission data of the entire network are generated.

[0117] Step S12: Construct provincial equivalent aggregation nodes and network equivalent aggregation nodes to simplify the structure of the State Grid provincial multi-level power system collaborative dispatch model;

[0118] Equivalent aggregation is an effective method for solving ultra-large-scale planning optimization calculations, involving network transformation, simplification, and equivalence in power grid calculations. This paper embeds equivalent aggregation to solve the multi-level coordinated balance of the national grid and provincial levels, such as... Figure 2 As shown, the provincial dispatch center coordinates internal resources such as directly dispatched generating units, wind and solar power, and energy storage to calculate the pre-balanced net load of the province, and equates it to the load of provincial nodes. The grid dispatch center coordinates resources such as directly dispatched generating units based on the load of each provincial node, and performs balance calculations considering power flow constraints, and equates the regional net load to the regional node load. The national dispatch center coordinates resources such as directly dispatched thermal power units based on the load of each regional node, and performs balance calculations considering power flow constraints.

[0119] Step S13: The order of national, grid, and province is used as the outer loop order of the simplified national grid-province multi-level power system collaborative dispatch model, and the order of province, grid, and national is used as the inner loop order of the structure. The simplified national grid-province multi-level power system collaborative dispatch model is solved based on the objective cascading method to obtain the multi-level power system collaborative dispatch operation results.

[0120] Specifically, this includes: after determining the output of provincial-level thermal power unit i3 within the provincial dispatch range a3 in time period t, determining whether the first absolute values ​​of the reverse relaxation variable and the positive relaxation variable of the load in region a1, and the second absolute values ​​of the positive relaxation variable and the negative relaxation variable of the load in province a2, all satisfy the first preset constraint condition; if all are satisfied, then the system net load of region a1 in time period t is determined; if not, the penalty coefficient of the State Grid provincial multi-level power system collaborative dispatch model is updated; after determining the system net load of region a1 in time period t, determining whether the first and second absolute values ​​both satisfy the second preset constraint condition; if satisfied, then determining whether the State Grid provincial multi-level power system collaborative dispatch model satisfies the global constraint condition; if not, then the penalty coefficient of the State Grid provincial multi-level power system collaborative dispatch model is updated; if the global constraint condition is satisfied, then the multi-level power system collaborative dispatch operation result is output; if not, then the index values ​​of the inner and outer loop structures are updated. For details, please refer to [reference needed]. Figure 3 It should be noted that, Figure 3 Some characters are misaligned, for example as well as Please refer to the instruction manual for details.

[0121] The first preset constraint is that the absolute value of the difference between the time zone / province load slack variables in the outer ring balancing pre-plan is less than ε1; the second preset constraint is that the absolute value of the difference between the time zone / province load slack variables in the inner ring balancing plan adjustment is less than ε2; ​​the global constraint is the first preset constraint + the second preset constraint + optimal economy.

[0122] Under the theory of equivalent aggregation, the original multi-level network structure of national-grid-provincial levels is simplified. However, solving the model involves large-scale cross-provincial and cross-regional resource scheduling. In actual spatial scales, there are still many operating nodes and complex connection modes. Therefore, the objective cascading analysis method is adopted to solve the problem. and Introducing consistency constraints allows national, regional, and provincial surveys to solve problems independently while simultaneously transferring variables between them. For example... Figure 3 As shown, the national-grid-provincial multi-level collaborative optimization is specifically divided into two layers: an outer loop and an inner loop. The outer loop represents the top-down solution method of national dispatching, grid dispatching, and provincial dispatching, while the inner loop represents the bottom-up solution method of provincial dispatching, grid dispatching, and national dispatching within the loop. In both the inner and outer loops and the overall optimization, load slack variables must satisfy certain convergence constraints to ensure that the national-grid-provincial multi-level collaborative balance reaches its optimal level.

[0123] In summary, this invention provides a method for coordinated dispatch and operation of a State Grid provincial multi-level power system. The method includes: constructing a coordinated dispatch model of the State Grid provincial multi-level power system based on the target demand of the national dispatch center, the target demand of the grid dispatch center, the target demand of the provincial dispatch center, load balance constraints at each level, upper and lower limits of output of multiple directly dispatched units, tie-line trading constraints, unit output constraints of the provincial dispatch center, and positive and negative reserve constraints; constructing provincial equivalent aggregation nodes and grid equivalent aggregation nodes to simplify the structure of the coordinated dispatch model; using the order of national, grid, and province as the outer loop order of the simplified coordinated dispatch model, and the order of province, grid, and national as the inner loop order; and solving the simplified coordinated dispatch model of the State Grid provincial multi-level power system based on the target cascading method to obtain the coordinated dispatch operation results of the multi-level power system. In the coordinated dispatching at the national grid and provincial levels, the potential for mutual assistance across provinces and regions has not been fully explored. In the actual operation of the power grid, inter-regional and inter-provincial interconnection channels involve both dispatching plan factors and market factors. Existing studies mostly consider only the constraints of the interconnection lines at the sending and receiving ends, without refining the boundary condition adjustments caused by market factors. Furthermore, some directly dispatched units in the national and grid dispatching systems may meet multi-domain coordinated balance requirements. Existing studies generally only consider the upper and lower limits of the output of directly dispatched units, without refining the boundary condition adjustments caused by the "one unit sending multiple services" effect. This invention constructs a national-grid-provincial multi-level coordinated balance dispatching optimization model that considers the differences in hierarchical objectives and constraints, as well as the actual impact of directly dispatched units and interconnection lines, providing a reference for subsequent exploration of multi-level coordinated dispatching methods adapted to the national grid and provincial levels. This invention integrates equivalent aggregation and objective cascading methods to construct a solution method adapted to multi-level coordinated optimization dispatching at the national grid and provincial levels, taking into account both the actual power grid situation and internal mechanisms at each level, and improving the efficiency of power system optimization dispatching solutions under full grid coordination. This invention breaks through the limitations of existing research that ignores the fact that my country's dispatching system is actually a three-level coordinated dispatching system at the national, grid, and provincial levels, and only constructs a two-level coordinated optimization dispatching model from the perspective of two-level interconnection. In addition, the model breaks through the limitations of existing dispatching models that only consider the upper and lower limit constraints of directly dispatched units and the transmission capacity constraints of tie lines. It supplements the actual situation of "one unit sending multiple services" of directly dispatched units and the fact that tie line channels include both market and dispatching factors, and constructs a refined national-grid-provincial multi-level coordinated dispatching optimization model that takes into account the actual operation of directly dispatched units and tie lines.

[0124] Based on the same inventive concept, the present invention provides, as follows: Figure 4 The above describes a State Grid provincial multi-level power system collaborative dispatch and operation device, which includes:

[0125] Model building module 41 is used to build a State Grid provincial multi-level power system collaborative dispatch model based on the target demand of the national dispatch, the target demand of the grid dispatch, the target demand of the provincial dispatch, the load balance constraints at each level, the upper and lower limits of the output of multiple directly dispatched units, the tie line transaction constraints, the unit output constraints of the provincial dispatch, and the positive and negative reserve constraints.

[0126] The structural simplification module 42 is used to construct provincial equivalent aggregation nodes and network equivalent aggregation nodes to simplify the structure of the State Grid provincial multi-level power system collaborative dispatch model;

[0127] The execution result module 43 is used to take the order of national, grid, and province as the outer loop order of the simplified national grid provincial multi-level power system collaborative scheduling model, and the order of province, grid, and national as the inner loop order of the structure. Based on the objective cascading method, the simplified national grid provincial multi-level power system collaborative scheduling model is solved to obtain the multi-level power system collaborative scheduling operation results.

[0128] Since the electronic device described in this embodiment is an electronic device used to implement the information processing method in the embodiments of the present invention, those skilled in the art can understand the specific implementation methods and various variations of the electronic device in this embodiment based on the information processing method described in the embodiments of the present invention. Therefore, how the electronic device implements the method in the embodiments of the present invention will not be described in detail here. Any electronic device used by those skilled in the art to implement the information processing method in the embodiments of the present invention falls within the scope of protection of the present invention.

[0129] 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.

[0130] 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.

[0131] 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.

[0132] 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.

[0133] Although preferred embodiments of the invention have been described, those skilled in the art, upon learning the basic inventive concept, can make other changes and modifications to these embodiments. Therefore, the appended claims are intended to be interpreted as including both the preferred embodiments and all changes and modifications falling within the scope of the invention.

[0134] Obviously, those skilled in the art can make various modifications and variations to this invention without departing from its spirit and scope. Therefore, if these modifications and variations fall within the scope of the claims of this invention and their equivalents, this invention also intends to include these modifications and variations.

Claims

1. A method for coordinated dispatch and operation of a multi-level power system at the provincial level under the State Grid, characterized in that, The method includes: Based on the target demand of the national dispatch, the target demand of the grid dispatch, the target demand of the provincial dispatch, the load balance constraints at each level, the upper and lower limits of the output of multiple directly dispatched units, the tie line transaction constraints, the unit output constraints of the provincial dispatch, and the positive and negative reserve constraints, a multi-level collaborative dispatch model of the State Grid provincial power system is constructed. The structure of the State Grid provincial multi-level power system collaborative dispatch model is simplified by constructing provincial equivalent aggregation nodes and network equivalent aggregation nodes; The simplified State Grid-Province Multi-Level Power System Co-Dispatch Model is structured with the order of National, Grid, and Province as the outer loop order and the order of Province, Grid, and National as the inner loop order. The simplified model is solved using the objective cascading method to obtain the multi-level power system coordinated dispatch operation results, including: The scope of the provincial survey to be determined Internal inspection and adjustment of thermal power units During the period After exerting force, determine the area. Internal load reverse relaxation variable and region The first absolute value of the positive relaxation variable of internal load, and the province Positive slack variables of internal load and province Whether the second absolute value of the negative relaxation variable of the internal load satisfies the first preset constraint condition; If all conditions are met, then the region is determined. During the period The system net load; if not satisfied, the penalty coefficient of the State Grid provincial multi-level power system collaborative dispatch model is updated; Area to be determined During the period After determining the net load of the system, it is determined whether both the first absolute value and the second absolute value satisfy the second preset constraint condition. If satisfied, determine whether the State Grid provincial multi-level power system collaborative dispatch model satisfies the global constraints; if not satisfied, update the penalty coefficient of the State Grid provincial multi-level power system collaborative dispatch model. If the global constraints are met, the results of the multi-level power system coordinated dispatch operation are output. If not, the index values ​​of the inner and outer loop structures are updated. The first preset constraint is that the absolute value of the difference between the outer loop balance pre-planning time zone and the provincial load slack variable is less than ɛ1. The second preset constraint is that the absolute value of the difference between the inner loop balance plan adjustment time zone and the provincial load slack variable is less than ɛ2. The global constraint is that the first preset constraint, the second preset constraint, and the economy are optimal. ɛ2 and ɛ1 are both preset values.

2. The State Grid provincial multi-level power system collaborative dispatch and operation method as described in claim 1, characterized in that, The target requirement is to minimize system operating costs and transmission fees within the scope of national grid coordination, including: in, To minimize the sum of system operating costs and transmission fees within the scope of national grid coordination. The system operating costs within the scope of national coordination. For inter-regional power transmission costs within the scope of national coordination, For the region The system operating cost, Thermal power units dispatched by the state exist Operating costs for a given period of time This refers to the total number of regions within the scope of national coordination. The total number of running hours in a day. For the region Domestic thermal power units During the time period contribute, , as well as All are nationally dispatched thermal power units i The coefficient of the unit operating cost function is 1. For inter-regional connection lines exist Transmission power during the time period This represents the total number of inter-regional connection lines. For inter-regional connection lines k 1 in t Transmission power during a given time period.

3. The State Grid provincial multi-level power system collaborative dispatch and operation method as described in claim 2, characterized in that, The objective requirement is to minimize system operating costs and transmission fees within the coordination scope of the grid dispatching system, including: in, To minimize the sum of system operating costs and transmission fees within the coordination scope of the grid dispatching system, The system operating costs within the coordination scope of the network dispatching, For inter-provincial power transmission fees, For the provinces in the online survey The system operating costs, This refers to the total number of provinces within the coordination scope of the network survey. For grid-dispatch thermal power units exist Operating costs for a given period of time , as well as All are grid-dispatch thermal power units i The coefficient of the unit operating cost function is 2. For the province Internal network dispatching thermal power units During the period of effort, For inter-provincial transmission line fees, This represents the total number of inter-provincial communication lines. For inter-provincial communication lines k 2 in t Transmission power during a given time period.

4. The State Grid provincial multi-level power system collaborative dispatch and operation method as described in claim 3, characterized in that, The target requirement is the system operating cost within the scope of the provincial survey, including: in, To minimize the system operating costs of the provincial dispatch center, The system operating costs within the scope of the provincial transfer, For provincial thermal power units During the period Operating costs Within the scope of provincial survey Penalty fees for abandoning clean energy during certain periods Within the scope of provincial survey Offload penalty cost during the period The total number of thermal power units dispatched by the province. Scope of provincial survey The total number of independent energy storage facilities in the province. Independent energy storage for provincial power grid During the period The cost of charging and discharging , as well as, All are provincial-level thermal power units i The coefficient of the unit operating cost function is 3. Scope of provincial survey Internal inspection and adjustment of thermal power units During the period of effort, The penalty coefficient for abandoning clean energy. For the scope of provincial survey Total number of ventilation fans in the interior. For the scope of provincial survey Introspective ventilation fan During the period wind curtailment power, For the scope of provincial survey The province adjusts the total number of photovoltaic power plants. For the scope of provincial survey Internal photovoltaic adjustment During the period The power of abandoned light, This is the penalty factor for loss of load. For the scope of provincial survey Inside Power loss at all times Independent energy storage for provincial power grid The charging cost, Independent energy storage for provincial power grid The cost of discharge, For the scope of provincial survey Internal inspection and independent energy storage During the period The charging power, For the scope of provincial survey Internal inspection and independent energy storage During the period The discharge power.

5. The State Grid provincial multi-level power system collaborative dispatch and operation method as described in claim 4, characterized in that, Load balancing constraints at each level include: in, For the region During the period The system net load, For time period The sum of net loads in all provinces For the region Internal network dispatching thermal power units During the period of effort, For the region Inland water diversion generator units During the period of effort, For the region Internal water-regulating generator units During the period of effort, For the region Intranet ventilation fan During the period of effort, For the region Internal grid photovoltaic control During the period of effort, For the region Total number of thermal power units dispatched by the internal network. For the region The total number of domestic water diversion generating units For the region Total number of internal water-regulating generator units For the region Total number of internal network ventilation fans. For the region The total number of photovoltaic cells adjusted by the internal grid This refers to the total number of regions within the scope of national coordination. For the region Positive relaxation variables of internal load, For the region Internal load reverse relaxation variable, This represents the total number of inter-regional connection lines. For the region Domestic thermal power units During the period contribution; Also includes: in, For the province During the period The system net load, For the province in time period t The total system load, For the province Internal inspection and adjustment of thermal power units During the period of effort, For the province Internal water-regulating generator units During the period of effort, For the province Inland water diversion generator unit During the period of effort, For the province Introspective ventilation fan During the period of effort, For the province Internal photovoltaic adjustment During the period of effort, For the province Internal inspection and independent energy storage During the period The charging power, For the province Internal inspection and independent energy storage During the period The discharge power, For the province The total number of thermal power units adjusted within the province. For the province Total number of internal water-regulating generator units For the region The total number of water-diverting generating units in the inland provinces For the province Total number of ventilation fans in the interior. Indicates province The province adjusts the total number of photovoltaic power plants. Indicates province Internally, adjust the total number of independent energy storage facilities. For the province Positive slack variables of internal load, For the province The inverse relaxation variable of internal load, This represents the total number of inter-provincial communication lines. This refers to the total number of provinces within the coordination scope of the network survey. For the province Internal network dispatching thermal power units During the period target output; Also includes: in, Indicates the scope of provincial survey Inland water diversion generator unit During the period of effort, Indicates the scope of provincial survey Internal node inter-regional and inter-provincial connection lines k At any moment Transmission power, Indicates the scope of provincial survey Introspective ventilation fan During the period of effort, Indicates the scope of provincial survey Internal photovoltaic adjustment During the period of effort, Indicates the scope of provincial survey Internal inspection and independent energy storage During the period The charging power, Indicates the scope of provincial survey Internal inspection and independent energy storage During the period The discharge power, Indicates the scope of provincial survey Number of water diversion units in the province; Indicates the scope of provincial survey Internal node inter-regional and inter-provincial connection lines k The total number, The total number of thermal power units dispatched by the province. Scope of provincial survey The total number of independent energy storage facilities in the province. For the scope of provincial survey Total number of ventilation fans in the interior. Scope of provincial survey Internal inspection and adjustment of thermal power units During the period of effort, For the province in time period t The total system load.

6. The State Grid provincial multi-level power system collaborative dispatch and operation method as described in claim 5, characterized in that, Multiple direct-control unit output upper and lower limit constraints include: in, Indicates the national thermal power units To the region Percentage of output Indicates the national thermal power units Total number of supply areas For the region Domestic thermal power units During the period of effort, For the region a 1 domestic thermal power unit i 1. During the time period t Minimum output, For the region a 1 domestic thermal power unit i 1. During the time period t Maximum output; Also includes: in, Indicates the thermal power units dispatched by the grid. To the province a 2. Output percentage Indicates the thermal power units dispatched by the grid. The total number of supply areas For the province Internal network dispatching thermal power units During the period of effort, For grid-dispatch thermal power units i 2 during the time period t Minimum output, For grid-dispatch thermal power units i 2 during the time period t Maximum output.

7. A method for coordinated dispatch and operation of a multi-level power system at the State Grid provincial level as described in claim 6, characterized in that, Connector transaction constraints include: in, Indicates inter-regional and inter-provincial connection lines exist Transmission power at any given time Indicates inter-regional and inter-provincial connection lines exist Time Plan The transmission power at the following levels Indicates inter-regional and inter-provincial connection lines exist Time Trading The transmission power at the following levels; At that time, it was an inter-regional connection line. At that time, it was an inter-provincial communication line; Also includes: in, For connecting lines The positive correlation coefficient with the actual transaction power flow direction For transaction behavior at all levels During the period Trading power, Variables ranging from 0 to 1 represent trading behavior. Whether through a transaction path transmission, A variable that is 0-1 and represents a path Is it by the connecting line? composition, This represents the total number of transaction paths. For inter-regional and inter-provincial connection lines k n exist t Time Trading I n The transmission power below.

8. A method for coordinated dispatch and operation of a multi-level power system at the State Grid provincial level as described in claim 7, characterized in that, The provincial dispatch center's unit output constraints and positive and negative reserve constraints include: in, thermal power plants dispatched by the province i 3 during the time period Maximum output thermal power plants dispatched by the province i 3 during the time period Minimum output, This refers to the national thermal power unit group. During the period Maximum output This refers to the national thermal power unit group. During the period Minimum output, Indicates grid-dispatch thermal power unit group During the period Maximum output Indicates grid-dispatch thermal power unit group During the period Minimum output, Indicates the provincial-level thermal power unit group During the period t Maximum output Provincial thermal power unit group During the period t Minimum output, Indicates nationally dispatched thermal power units i 1. Maximum uphill speed Indicates nationally dispatched thermal power units i 1. Maximum downhill / climbing speed Indicates grid-dispatch thermal power units i 2. Maximum uphill speed Indicates grid-dispatch thermal power units i 2. Maximum downhill / climbing speed Indicates provincial-level thermal power units i 3. Maximum uphill speed Indicates provincial-level thermal power units i 3. Maximum downhill / climbing speed Indicates provincial-level thermal power units i 3 during the time period Start-stop status, The time indicates the provincial thermal power unit i 3 during the time period Shutdown Indicates provincial-level thermal power units i 3 during the time period Power on, For the scope of provincial survey Internal inspection and adjustment of hydropower units h 3 during the time period Internal capacity, Indicates the scope of provincial survey Internal inspection and adjustment of hydropower units h Minimum output of 3 Indicates time period t Unstable output of the unit - deduction value Indicates time period The system is meeting its backup capacity requirements. Indicates time period The system's negative backup capacity requirement. Scope of provincial survey Internal inspection and adjustment of thermal power units During the period of effort, For the region Internal network dispatching thermal power units During the period of effort, For the province Internal network dispatching thermal power units During the period of effort, For the region Internal network dispatching thermal power units During the period of effort, For the province Internal network dispatching thermal power units During the period of effort, Scope of provincial survey Internal inspection and adjustment of thermal power units During the period of effort.

9. A State Grid provincial multi-level power system collaborative dispatching and operation device, characterized in that, The apparatus used in the State Grid provincial multi-level power system collaborative dispatching and operation method according to any one of claims 1-8 includes: The model building module is used to construct a multi-level collaborative dispatch model of the State Grid and provincial power systems based on the target demand of the national dispatch, the target demand of the grid dispatch, the target demand of the provincial dispatch, the load balance constraints at each level, the upper and lower limits of the output of multiple directly dispatched units, the tie line transaction constraints, the unit output constraints of the provincial dispatch, and the positive and negative reserve constraints. The structural simplification module is used to construct provincial equivalent aggregation nodes and network equivalent aggregation nodes to simplify the structure of the State Grid provincial multi-level power system collaborative dispatch model; The execution results module is used to take the order of national, grid, and province as the outer loop order of the simplified national grid provincial multi-level power system collaborative scheduling model, and the order of province, grid, and national as the inner loop order of the structure. Based on the objective cascading method, the simplified national grid provincial multi-level power system collaborative scheduling model is solved to obtain the multi-level power system collaborative scheduling execution results.

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