Production simulation method and system

Abstract

The present invention provides a production simulation method and system. The method includes: obtaining the time-series production data of an arbitrary regional power grid within a preset time range; inputting the time-series production data into a pre-established production simulation system for hourly production simulation time series simulation of the entire network, and outputting the system operation state results of different pumped storage schemes in the regional power grid; obtaining the new energy consumption level and thermal power peak shaving situation of the regional power grid under different pumped storage schemes according to the system operation state results of different pumped storage schemes in the regional power grid; comparing the new energy consumption level and thermal power peak shaving situation of the regional power grid under different pumped storage schemes to obtain the difference results of different pumped storage schemes. Through the above method, it can provide a reference for improving the new energy consumption level of the system, reducing the potential benefits of deep thermal power peak shaving, and evaluating the technical and economic benefits of variable-speed pumped storage projects in power grid applications.

Description

Technical Field

[0001] The present invention relates to the technical field of simulation analysis of regional power grids, and particularly to a production simulation method and system. Background Art

[0002] Currently, the research on regional power grids based on pumped storage systems has become a hot topic. On the one hand, the adaptive application of pumped storage units has been optimized from the perspectives of pumped storage unit scheduling and modeling. On the other hand, a comprehensive problem with the goal of maximizing wind power consumption has been proposed from the perspective of regional power flow algorithms for wind power grid connection. However, with the increase in the proportion of new energy grid connection, the randomness and intermittency of the output of wind power and photovoltaic power pose new challenges to the safe and stable operation of the system, and the requirement for grid flexibility has also been greatly improved. The existing grid flexibility is insufficient, making the new energy consumption problem more prominent.

[0003] In the prior art, traditional pumped storage power stations mostly use constant-speed operating units, which have low operating efficiency and slow regulation speed, and cannot achieve rapid and effective power regulation under pumping conditions. The variable-speed pumped storage units include two technical routes: doubly fed induction machine (DFIM) and converter fed synchronous machine (CFSM). Compared with traditional fixed-speed units, variable-speed pumped storage units can expand the power regulation range, regulate and absorb system reactive power, improve operating efficiency, system stability, and improve the consumption of renewable energy.

[0004] When new energy units generate electricity, the power system needs to absorb the output of new energy as much as possible. At this time, in essence, wind power replaces other power sources for power generation. When the wind turbine does not generate electricity, other power sources are required to normally meet the load requirements of the power system. Due to the characteristics of new energy, whether it is consumed in the local regional power grid or transmitted for consumption, other power sources or energy storage devices are required to be matched and compensated for operation to reduce its impact on the stable operation of the power system. When the output of new energy units is excessive, the pumped storage units have the ability to absorb the excessive output of new energy through pumping power regulation and conventional start-stop peak regulation methods in cooperation with the fluctuations of new energy. Summary of the Invention

[0005] In view of this, embodiments of the present invention provide a production simulation method and system to solve the problem of new energy consumption in the prior art.

[0006] To achieve the above object, embodiments of the present invention provide the following technical solutions:

[0007] A first aspect of an embodiment of the present invention discloses a production simulation method, and the method includes:

[0008] Obtain the time-series production data of the power grid in any area within a preset time range, where the time-series production data includes power grid data and power generation data, the power grid data includes grid topology, line parameters, and node loads, and the power generation data includes new energy power generation, installed capacity, and power generation cost;

[0009] Input the time-series production data into a pre-established production simulation system for hourly production simulation time-series simulation of the entire network, and output the system operation state results of different pumped storage schemes in the regional power grid. Among them, the production simulation system is established from the different types of pumped storage schemes and the corresponding operation strategies of the pumped storage schemes. The different types of pumped storage schemes and the corresponding operation strategies of the pumped storage schemes are preset. The different types of pumped storage schemes include fixed-speed pumped storage schemes and variable-speed pumped storage schemes;

[0010] According to the system operation state results of the different pumped storage schemes in the regional power grid, obtain the new energy consumption level and thermal power peak shaving situation of the regional power grid under the different pumped storage schemes;

[0011] Compare the new energy consumption level and thermal power peak shaving situation of the regional power grid under the different pumped storage schemes to obtain the difference results of the different pumped storage schemes.

[0012] Optionally, the inputting the time-series production data into a pre-established production simulation system for hourly production simulation time-series simulation of the entire network and outputting the system operation state results of each hour of the regional power grid includes:

[0013] Input the time-series production data into a pre-established production simulation system;

[0014] During the time-series simulation process of the production simulation system, according to the preset different types of pumped storage schemes and the corresponding operation strategies of the pumped storage schemes, conduct hourly production simulation time-series simulation of the operation state of the regional power grid every hour of the whole year to obtain the simulation operation results of the different types of pumped storage schemes in the regional power grid;

[0015] According to the optimal direct current power flow algorithm, analyze the simulation operation results of the different pumped storage schemes in the regional power grid to obtain the system operation state results of the different pumped storage schemes in the regional power grid.

[0016] Optionally, during the time-series simulation process of the production simulation system, according to the preset different types of pumped storage schemes and the corresponding operation strategies of the pumped storage schemes, conduct hourly production simulation time-series simulation of the operation state of the regional power grid every hour of the whole year to obtain the simulation operation results of the different types of pumped storage schemes in the regional power grid, including:

[0017] During the time series simulation of the production simulation system, if the current pumped storage plan is the fixed-speed pumped storage plan, according to the fixed-speed pumped storage plan and the corresponding operation strategy of the fixed-speed pumped storage plan, a network-wide hourly production simulation time series simulation is performed on the operating status of the regional power grid every hour throughout the year, and the simulation operation results of the fixed-speed pumped storage plan in the regional power grid are obtained.

[0018] Optionally, during the time series simulation of the production simulation system, according to different types of pumped storage plans and the corresponding operation strategies of the pumped storage plans, a network-wide hourly production simulation time series simulation is performed on the operating status of the regional power grid every hour throughout the year, and the simulation operation results of the different types of pumped storage plans in the regional power grid are obtained, including:

[0019] During the time series simulation of the production simulation system, if the current pumped storage plan is the variable-speed pumped storage plan, according to the variable-speed pumped storage plan and the corresponding operation strategy of the variable-speed pumped storage plan, a network-wide hourly production simulation time series simulation is performed on the operating status of the regional power grid every hour throughout the year, and the simulation operation results of the variable-speed pumped storage plan in the regional power grid are obtained.

[0020] Optionally, obtaining the new energy consumption level and thermal power peak shaving situation of the regional power grid under different pumped storage plans according to the system operation status results of different pumped storage plans in the regional power grid includes:

[0021] According to the system operation status results of different pumped storage plans in the target regional power grid, calculate the system wind and light curtailment rates, wind and light curtailment rates of each node, average thermal power peak shaving depth, and annual thermal power peak shaving cycle numbers under different pumped storage plans;

[0022] Correspondingly, comparing the new energy consumption levels and thermal power peak shaving situations of the regional power grid under different pumped storage plans to obtain the difference results of different pumped storage plans includes:

[0023] Compare the system wind and light curtailment rates, wind and light curtailment rates of each node, average thermal power peak shaving depth, and annual thermal power peak shaving cycle numbers under different pumped storage plans to obtain the difference results of different pumped storage plans.

[0024] A second aspect of the embodiments of the present invention discloses a production simulation system, and the system includes:

[0025] An acquisition module, configured to acquire time series production data of any regional power grid within a preset time range, where the time series production data includes power grid data and power generation data, the power grid data includes grid topology, line parameters, and node loads, and the power generation data includes new energy power generation, installed capacity, and power generation cost;

[0026] The time series simulation module is used to input the time series production data into a pre-established production simulation system for hourly production simulation time series simulation of the entire network, and output the system operation state results of different pumped storage schemes in the regional power grid. Among them, the production simulation system is established from the different types of pumped storage schemes and the operation strategies corresponding to the pumped storage schemes. The different types of pumped storage schemes and the operation strategies corresponding to the pumped storage schemes are pre-set. The different types of pumped storage schemes include constant-speed pumped storage schemes and variable-speed pumped storage schemes;

[0027] The obtaining module is used to obtain the new energy consumption level and thermal power peak shaving situation of the regional power grid under different pumped storage schemes according to the system operation state results of different pumped storage schemes in the regional power grid;

[0028] The comparison module is used to compare the new energy consumption level and thermal power peak shaving situation of the regional power grid under different pumped storage schemes, and obtain the difference results of different pumped storage schemes.

[0029] Optionally, the time series simulation module includes:

[0030] The input unit is used to input the time series production data into a pre-established production simulation system;

[0031] The time series simulation unit is used to perform hourly production simulation time series simulation of the operation state of the entire network for each hour of the whole year of the regional power grid according to different types of pre-set pumped storage schemes and the operation strategies corresponding to the pumped storage schemes during the time series simulation process of the production simulation system, and obtain the simulation operation results of different types of pumped storage schemes in the regional power grid;

[0032] The analysis unit is used to analyze the simulation operation results of different pumped storage schemes in the regional power grid according to the optimal direct current power flow algorithm, and obtain the system operation state results of different pumped storage schemes in the regional power grid.

[0033] Optionally, the time series simulation unit is specifically used for:

[0034] During the time series simulation process of the production simulation system, if the current pumped storage scheme is the constant-speed pumped storage scheme, perform hourly production simulation time series simulation of the operation state of the entire network for each hour of the whole year of the regional power grid according to the constant-speed pumped storage scheme and the operation strategy corresponding to the constant-speed pumped storage scheme, and obtain the simulation operation results of the constant-speed pumped storage scheme in the regional power grid.

[0035] Optionally, the time series simulation unit is also specifically used for:

[0036] During the time series simulation of the production simulation system, if the current pumped storage plan is the variable-speed pumped storage plan, according to the variable-speed pumped storage plan and the corresponding operation strategy of the variable-speed pumped storage plan, conduct a whole-network hourly production simulation time series simulation on the operation status of the regional power grid every hour throughout the year to obtain the simulation operation results of the variable-speed pumped storage plan in the regional power grid.

[0037] Optionally, the obtaining module is specifically configured to:

[0038] According to the system operation status results of the different pumped storage plans in the target regional power grid, calculate the system wind and light curtailment rates, the wind and light curtailment rates of each node, the average peak shaving depth of thermal power, and the annual peak shaving cycle number of thermal power under the different pumped storage plans;

[0039] Correspondingly, the comparing module is specifically configured to:

[0040] Compare the system wind and light curtailment rates, the wind and light curtailment rates of each node, the average peak shaving depth of thermal power, and the annual peak shaving cycle number of thermal power under the different pumped storage plans to obtain the difference results of the different pumped storage plans.

[0041] Based on the production simulation method and system provided by the embodiments of the present invention described above, the method includes: obtaining the time-series production data of an arbitrary regional power grid within a preset time range, where the time-series production data includes power grid data and power generation data, the power grid data includes grid topology, line parameters, and node loads, and the power generation data includes new energy power generation, installed capacity, and power generation cost; inputting the time-series production data into a pre-established production simulation system for hourly production simulation time-series simulation of the entire network, and outputting the system operation state results of different pumped storage schemes in the regional power grid, where the production simulation system is established from the different types of pumped storage schemes and the operation strategies corresponding to the pumped storage schemes, the different types of pumped storage schemes and the operation strategies corresponding to the pumped storage schemes are preset, and the different types of pumped storage schemes include fixed-speed pumped storage schemes and variable-speed pumped storage schemes; obtaining the new energy consumption level and thermal power peak shaving situation of the regional power grid under different pumped storage schemes according to the system operation state results of different pumped storage schemes in the regional power grid; comparing the new energy consumption level and thermal power peak shaving situation of the regional power grid under different pumped storage schemes to obtain the difference results of different pumped storage schemes. In this solution, after obtaining the time-series production data, the time-series production data is input into the production simulation system for time-series simulation. According to the output system operation state results of different pumped storage schemes in the regional power grid, the new energy consumption level and thermal power peak shaving situation of the regional power grid under different pumped storage schemes are obtained and compared, so as to obtain the difference results of different pumped storage schemes, and further provide a reference for improving the new energy consumption level of the system, reducing the potential benefits of deep thermal power peak shaving, and evaluating the technical and economic benefits of variable-speed pumped storage projects in power grid applications. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the drawings in the following description are only the embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained according to the provided drawings without creative efforts.

[0043] Figure 1 It is a schematic flowchart of a production simulation method provided by an embodiment of the present invention;

[0044] Figure 2 It is a schematic flowchart of an hourly production simulation time-series simulation of the entire network provided by an embodiment of the present invention;

[0045] Figure 3 It is a schematic flowchart of another production simulation method provided by an embodiment of the present invention;

[0046] Figure 4Schematic structural diagram of a production simulation system provided by an embodiment of the present invention. Detailed implementation manners

[0047] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0048] In this application, the terms "include", "comprise" or any other variant thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements, but also includes other elements not expressly listed, or also includes elements inherent to such process, method, article or device. Without further limitation, the element defined by the statement "including one..." does not exclude the existence of additional identical elements in the process, method, article or device including the said element.

[0049] The terms "first", "second", "third", "fourth", etc. (if any) in the specification and claims of this application and the above-mentioned drawings are used to distinguish similar objects, and do not have to be used to describe a specific order or sequence. It should be understood that such data used can be interchanged under appropriate circumstances so that the embodiments described here can be implemented in an order other than that illustrated or described here.

[0050] As can be seen from the background technology, due to the characteristics of new energy, whether it is for local grid consumption or external transmission and consumption, other power sources or energy storage devices are required to be matched and operated for compensation to mitigate the impact on the stable operation of the power system.

[0051] Therefore, an embodiment of the present invention provides a production simulation method and system. In this solution, after obtaining the time-series production data, the time-series production data is input into the production simulation system for time-series simulation. According to the system operation state results of different pumped storage schemes in the regional power grid output, the new energy consumption level and thermal power peak regulation situation of the regional power grid under different pumped storage schemes are obtained and compared, so as to obtain the difference results of different pumped storage schemes, and further provide a reference for improving the new energy consumption level of the system, reducing the potential benefits of deep thermal power peak regulation, and evaluating the technical and economic benefits of variable-speed pumped storage projects in grid applications.

[0052] As Figure 1 shown, it is a schematic flow diagram of a production simulation method provided by an embodiment of the present invention.

[0053] It should be noted that in the embodiments of the present invention, the production simulation method is a production simulation method for evaluating the improvement of new energy consumption by variable pumped storage.

[0054] The production simulation method mainly includes the following steps:

[0055] Step S101: Obtain the time-series production data of an arbitrary regional power grid within a preset time range.

[0056] In step S101, the time-series production data includes power grid data and power generation data.

[0057] The power grid data includes grid topology, line parameters, and node loads, which are not limited in the present invention.

[0058] The power generation data includes new energy power generation, installed capacity, and power generation cost, which are not limited in the present invention.

[0059] It should be noted that in practical applications, the regional power grid is simplified into a regional node grid model.

[0060] It should be noted that the preset time range includes but is not limited to the whole year, where the whole year is 365 days.

[0061] In the process of specifically implementing step S101, obtain the time-series data of an arbitrary regional power grid within the preset time range, and organize the time-series data to obtain the time-series production data.

[0062] It can be understood that by obtaining and organizing the annual time-series data of the regional power grid, available time-series production data can be obtained.

[0063] That is to say, obtain power grid data such as grid topology, line parameters, and node loads, as well as obtain power generation data such as new energy power generation, installed capacity, and power generation cost, and organize the power grid data and power generation data to obtain available time-series production data.

[0064] Step S102: Input the time-series production data into a pre-established production simulation system for hourly production simulation time-series simulation of the entire network, and output the system operation state results of different pumped storage schemes in the regional power grid.

[0065] In step S102, the production simulation system is established from different types of pumped storage schemes and the corresponding operation strategies of the pumped storage schemes.

[0066] The different types of pumped storage schemes and the corresponding operation strategies of the pumped storage schemes are preset.

[0067] The different types of pumped storage schemes include constant-speed pumped storage schemes and variable-speed pumped storage schemes.

[0068] It should be noted that the operation strategies of the fixed-speed pumped-storage units and the variable-speed pumped-storage units are set according to different types of pumped-storage schemes.

[0069] Among them, the variable-speed pumped-storage units include AC-excited units and full-power variable-frequency units.

[0070] It should be noted that the operation strategy of the fixed-speed pumped-storage scheme (i.e., the operation strategy of the fixed-speed pumped-storage units) is as follows: full-power pumping for 7 hours from 0:00 to 7:00 in the morning (00:00~07:00), full-power power generation for about 4 hours during the evening peak (16:00~20:00), and peak shaving operation for about 3 hours during the morning sub-peak (10:00~13:00).

[0071] The operation strategy of the variable-speed pumped-storage scheme (i.e., the operation strategy of the variable-speed pumped-storage units) is the same as that of the fixed-speed pumped-storage scheme in the power generation condition and the corresponding power generation time period, that is: full-power power generation for about 4 hours from 16:00 to 20:00, and peak shaving operation for about 3 hours from 10:00 to 13:00; however, it is different in the pumping condition. During the night pumping period, the operation strategy of the variable-speed pumped-storage units is to perform variable-power peak shaving pumping operation to match the local new energy output. The pumping power can be adjusted within the range of 80 - 100% (AC excitation) and 60 - 100% (full-power variable frequency) of the rated pumping power, and the speed regulation range is ±7% (AC excitation) and ±15% (full-power variable frequency).

[0072] In the embodiment of the present invention, the hourly production simulation time series simulation of the entire network is the annual 8760-hour production simulation time series simulation.

[0073] In the process of specifically implementing step S102, a production simulation system is established in advance using different types of pumped-storage schemes and the operation strategies corresponding to the pumped-storage schemes. After obtaining the time series production data of the regional power grid, the obtained time series production data is input into the established production simulation system for hourly production simulation time series simulation of the entire network, and the system operation state results of different pumped-storage schemes in the regional power grid are output.

[0074] It can be understood that the regional power grid is simplified into a regional node network model, and power grid data such as network topology, line parameters, node loads, etc., as well as power generation data such as the actual hourly output of new energy, the installed capacity of various power generation resources, and the power generation cost, are input into the production simulation system for hourly production simulation time series simulation of the entire network, and the system operation state results of different pumped-storage schemes in the regional power grid are output, that is, the system operation state results of the fixed-speed pumped-storage scheme in the regional power grid and the system operation state results of the variable-speed pumped-storage scheme in the regional power grid are output.

[0075] Step S103: According to the system operation state results of different pumped-storage schemes in the regional power grid, obtain the new energy consumption level and thermal power peak shaving situation of the regional power grid under different pumped-storage schemes.

[0076] In the process of specifically implementing step S103, according to the system operation state results of the fixed-speed pumped storage scheme in the regional power grid, the new energy consumption level and thermal power peak shaving situation of the regional power grid under the fixed-speed pumped storage scheme are obtained, and, according to the system operation state results of the variable-speed pumped storage scheme in the regional power grid, the new energy consumption level and thermal power peak shaving situation of the regional power grid under the variable-speed pumped storage scheme are obtained.

[0077] Step S104: Compare the new energy consumption level and thermal power peak shaving situation of the regional power grid under different pumped storage schemes to obtain the difference results of different pumped storage schemes.

[0078] In the process of specifically implementing step S104, compare the new energy consumption level and thermal power peak shaving situation of the regional power grid under the fixed-speed pumped storage scheme and the new energy consumption level and thermal power peak shaving situation of the regional power grid under the variable-speed pumped storage scheme to obtain the difference results between the fixed-speed pumped storage scheme and the variable-speed pumped storage scheme.

[0079] It can be understood that, according to the obtained new energy consumption level and thermal power peak shaving situation of the regional power grid under different pumped storage schemes, evaluate the pumped storage scheme, so as to consider the operation strategies of different pumped storage schemes, the new energy consumption levels of different pumped storage schemes, and the thermal power peak shaving situations in the power grid planning scheme.

[0080] Based on a production simulation method provided by an embodiment of the present invention, the method includes: obtaining time-series production data of an arbitrary regional power grid within a preset time range, where the time-series production data includes power grid data and power generation data, the power grid data includes grid topology, line parameters, and node loads, and the power generation data includes new energy power generation, installed capacity, and power generation cost; inputting the time-series production data into a pre-established production simulation system for hourly production simulation time-series simulation of the entire network, and outputting the system operation state results of different pumped storage schemes in the regional power grid, where the production simulation system is established from different types of pumped storage schemes and the operation strategies corresponding to the pumped storage schemes, the different types of pumped storage schemes and the operation strategies corresponding to the pumped storage schemes are pre-set, and the different types of pumped storage schemes include fixed-speed pumped storage schemes and variable-speed pumped storage schemes; obtaining the new energy consumption level and thermal power peak regulation situation of the regional power grid under different pumped storage schemes according to the system operation state results of different pumped storage schemes in the regional power grid; comparing the new energy consumption level and thermal power peak regulation situation of the regional power grid under different pumped storage schemes to obtain the difference results of different pumped storage schemes. In this solution, after obtaining the time-series production data, the time-series production data is input into the production simulation system for time-series simulation, and according to the output system operation state results of different pumped storage schemes in the regional power grid, the new energy consumption level and thermal power peak regulation situation of the regional power grid under different pumped storage schemes are obtained and compared, so as to obtain the difference results of different pumped storage schemes, and further provide a reference for improving the new energy consumption level of the system, reducing the potential benefits of deep thermal power peak regulation, and evaluating the technical and economic benefits of variable-speed pumped storage projects in power grid applications.

[0081] Based on the production simulation method provided by the above embodiment of the present invention, the process of performing step S102 to input the time-series production data into a pre-established production simulation system for hourly production simulation time-series simulation of the entire network and output the system operation state results of different pumped storage schemes in the regional power grid is as Figure 2 shown, which is a flow schematic diagram of an hourly production simulation time-series simulation of the entire network provided by an embodiment of the present invention, and mainly includes the following steps:

[0082] Step S201: Input the time-series production data into a pre-established production simulation system.

[0083] In the process of specifically implementing step S201, a production simulation system is pre-established by using different types of pumped storage schemes and the operation strategies corresponding to the pumped storage schemes. After obtaining the time-series production data of the regional power grid, the obtained time-series production data is input into the established production simulation system.

[0084] It is understandable that the regional power grid is simplified into a regional node network model, and power grid data such as network topology, line parameters, node loads, etc., as well as power generation data such as the actual hourly output of new energy, the installed capacity of various power generation resources, and the power generation cost are input into the production simulation system.

[0085] Step S202: During the time-series simulation of the production simulation system, according to different types of pumped storage schemes and the corresponding operation strategies preset, conduct a whole-network hourly production simulation time-series simulation on the operation state of the regional power grid every hour throughout the year to obtain the simulation operation results of different types of pumped storage schemes in the regional power grid.

[0086] In the process of specifically implementing step S202, during the time-series simulation of the production simulation system, obtain different types of pumped storage schemes and the corresponding operation strategies preset, and according to different types of pumped storage schemes and the corresponding operation strategies, conduct a whole-network hourly production simulation time-series simulation on the operation state of the regional power grid every hour throughout the year to obtain the simulation operation results of different types of pumped storage schemes in the regional power grid.

[0087] In other words, according to the fixed-speed pumped storage scheme and the corresponding operation strategy preset, as well as the variable-speed pumped storage scheme and the corresponding operation strategy, conduct a whole-network hourly production simulation time-series simulation on the operation state of the regional power grid every hour throughout the year to obtain the simulation operation results of the fixed-speed pumped storage scheme in the regional power grid and the simulation operation results of the variable-speed pumped storage scheme in the regional power grid.

[0088] It should be noted that the simulation calculation for each hour relies on the power grid analysis to simulate the operation state of the whole network in that hour.

[0089] Optionally, when executing step S202, during the time-series simulation of the production simulation system, according to different types of pumped storage schemes and the corresponding operation strategies preset, the process of conducting a whole-network hourly production simulation time-series simulation on the operation state of the regional power grid every hour throughout the year to obtain the simulation operation results of different types of pumped storage schemes in the regional power grid includes:

[0090] During the time-series simulation of the production simulation system, if the current pumped storage scheme is a fixed-speed pumped storage scheme, according to the fixed-speed pumped storage scheme and the corresponding operation strategy, conduct a whole-network hourly production simulation time-series simulation on the operation state of the regional power grid every hour throughout the year to obtain the simulation operation results of the fixed-speed pumped storage scheme in the regional power grid.

[0091] Optionally, when performing step S202 in the time series simulation of the production simulation system, according to different types of pumped storage schemes set in advance and the corresponding operation strategies of the pumped storage schemes, perform a whole-network hourly production simulation time series simulation on the operation status of the regional power grid every hour of the whole year to obtain the simulation operation results of different types of pumped storage schemes in the regional power grid, including:

[0092] During the time series simulation of the production simulation system, if the current pumped storage scheme is a variable-speed pumped storage scheme, according to the variable-speed pumped storage scheme and the corresponding operation strategy of the variable-speed pumped storage scheme, perform a whole-network hourly production simulation time series simulation on the operation status of the regional power grid every hour of the whole year to obtain the simulation operation results of the variable-speed pumped storage scheme in the regional power grid.

[0093] Step S203: According to the optimal direct current power flow algorithm, analyze the simulation operation results of different pumped storage schemes in the regional power grid to obtain the system operation status results of different pumped storage schemes in the regional power grid.

[0094] In step S203, the optimal direct current power flow (DCOPF) algorithm takes the cost optimization as the objective function.

[0095] In the embodiment of the present invention, during the time series simulation of the production simulation system, the optimal direct current power flow calculation method with the cost optimization as the objective function is applied to realize the optimal dispatching of various power generation resources in the power grid.

[0096] Among them, the objective function of the optimal direct current power flow algorithm is to minimize the power grid load shedding cost, the generator power generation cost, and the pumped storage unit power generation and pumping cost under the system operation constraint conditions.

[0097] Among them, the constraint conditions include but are not limited to the line transmission capacity limit Si, the upper and lower limits and ramp limits Gy of the generator output, the node voltage limit Vx, and the pumped storage capacity limit CPHS.

[0098] In practical applications, set the objective function of the optimal direct current power flow algorithm and establish relevant constraint conditions.

[0099] The objective function and relevant constraint conditions are as follows:

[0100] (1) Objective function:

[0101]

[0102] Among them, x is the node number, N D is the number of nodes, f D x is the load shedding cost function, D a xis the actual supply load at node x, D t x is the actual required load at node x, y is the generator set number, N g is the number of generator sets, z is the pumped-storage unit number, N PHS is the number of pumped-storage units, f p y is the active power output cost function of generator set y, f p z is the active power output cost function of pumped-storage unit z, p g y is the active power output of the y-th generator set, p g z is the active power output of the z-th pumped-storage unit, p p z is the active power of pumping of the z-th pumped-storage unit.

[0103] (2) Line capacity constraint:

[0104] -S max,i ≤S i ≤S max,i , (2), where i is the line number, S max,i is the upper limit of the current-carrying capacity of line i, S i is the load of line i.

[0105] (3) Generation upper and lower limit constraints:

[0106] G min,y ≤G y ≤G max,y , (3),

[0107] where Gmin,y is the lower limit of the output of generator set y, Gmax,y is the upper limit of the output of generator set y, and Gy is the actual output of generator set y.

[0108] (4) Node voltage constraint:

[0109] V min,x ≤V x ≤V max,x , (4),

[0110] where, V min,x is the lower limit of the voltage at node x, V max,x is the upper limit of the voltage at node x, V x is the actual voltage at node x.

[0111] (5) Line capacity constraint:

[0112] C min,PHS ≤C PHS ≤Cmax,PHS , (5),

[0113] Among them, C min,PHS is the lower limit of the capacity of the pumped-storage unit, and C max,PHS is the upper limit of the capacity of the pumped-storage unit, and C PHS is the actual capacity of the pumped-storage unit.

[0114] Under the condition that the constraint conditions permit, the optimal DC power flow calculation will preferentially call the generator set y with lower cost to supply the power load.

[0115] Among them, the operating cost ranking is: 0 < photovoltaic ≈ wind power < hydropower ≈ pumped storage << thermal power < thermal power generation, that is: 0 < f P 光伏 ≈ f P 风电 < f P 水电 ≈ f P 抽蓄 << f P 热电 < f P 火电 .

[0116] When the normal call of the generator set cannot meet all the loads, the calculation will adopt the method of cutting off part of the load to meet the system constraints and power balance requirements.

[0117] The load to be cut off can be calculated from the difference between the actual supplied load D x a and the actual required load D x t at node x, and the cost caused by load shedding can be calculated from the amount of load cut off and the load shedding cost function.

[0118] The goal of the optimal DC power flow calculation is to minimize the system operating cost, that is: system operating cost = cost caused by load shedding + cost generated by power generation + cost generated by pumped-storage power generation and pumping.

[0119] Therefore, from the above description, it can be seen that the operating power of the variable-speed pumped-storage unit under the power generation and pumping conditions is also determined and scheduled by the system operation optimization of formula (1), and its optimization goal is to minimize the system operating cost. That is to say, the operating power of the variable-speed pumped-storage unit under the power generation and pumping conditions is scheduled by the cost-optimal objective function of the optimal power flow DC calculation, including: cost caused by load shedding + cost generated by power generation + cost generated by pumped-storage power generation and pumping.

[0120] According to the operating cost ranking of various types of units above (0 < Photovoltaic ≈ Wind power < Hydropower ≈ Pumped storage << Thermal power < Thermal power), the following two points will be followed during the operation call in the time series simulation of the production simulation system:

[0121] 1. When the pumped storage is operating for peak shaving power generation, the system will preferentially call for more new energy generation when the operating constraints allow, followed by arranging the pumped storage units for peak shaving power generation, and finally arranging the thermal power and thermal power generation units for power generation.

[0122] 2. When the pumped storage is operating for peak shaving and pumping, when the new energy generation cost is lower than the pumped storage pumping cost (f P 光伏 ≈f P 风电 <f P 抽蓄 ), the system will arrange for the pumped storage units to pump water at high power / full power during the peak wind power generation period at night and at low power / minimum power during the under-generation period of wind power according to the optimized dispatching results, so as to realize the variable power pumping power control of the pumped storage units following the fluctuations of new energy generation, and the optimized operation dispatching of the system for the pumped storage units under the variable power pumping condition.

[0123] In the process of specifically implementing step S203, according to the optimal DC power flow algorithm, analyze the simulation operation results of different pumped storage schemes in the regional power grid, and obtain the system operation state results of different pumped storage schemes in the regional power grid, that is, according to the optimal DC power flow algorithm, analyze the simulation operation results of the fixed-speed pumped storage scheme in the regional power grid and the simulation operation results of the variable-speed pumped storage scheme in the regional power grid, and obtain the system operation state results of the fixed-speed pumped storage scheme in the regional power grid and the system operation state results of the variable-speed pumped storage scheme in the regional power grid.

[0124] Through the above description, it can be understood that different types of pumped storage schemes and the corresponding operation strategies of the pumped storage schemes are introduced as boundary conditions to perform time series simulation on the power grid planning scheme.

[0125] Based on a production simulation method provided by an embodiment of the present invention, during the time series simulation of the production simulation system, according to different types of pumped storage schemes and the corresponding operation strategies of the pumped storage schemes, perform a whole-network hourly production simulation time series simulation on the operation state of the regional power grid every hour of the whole year, providing a basis for obtaining the difference results of different pumped storage schemes subsequently, and further providing a reference for improving the new energy consumption level of the system, reducing the potential benefits of deep peak shaving of thermal power, and the technical and economic benefit evaluation of the variable-speed pumped storage project in the power grid application.

[0126] Based on a production simulation method provided by an embodiment of the present invention above, such as Figure 3As shown in the figure, it is a schematic flowchart of another production simulation method provided by an embodiment of the present invention, mainly including the following steps:

[0127] Step S301: Obtain the time-series production data of the power grid in any area within a preset time range.

[0128] Step S302: Input the time-series production data into a pre-established production simulation system for hourly production simulation time-series simulation of the entire network, and output the system operation state results of different pumped storage schemes in the regional power grid.

[0129] It should be noted that the execution principles and processes of the above steps S301 to S302 are the same as those of Figure 1 the execution principles and processes of steps S101 to S102 disclosed in

[0130] Step S303: According to the system operation state results of different pumped storage schemes in the target regional power grid, calculate the system wind and light curtailment rates, wind and light curtailment rates of each node, average thermal power peak shaving depth, and annual thermal power peak shaving cycle numbers under different pumped storage schemes.

[0131] In the specific process of implementing step S303, according to the system operation state results of the fixed-speed pumped storage scheme in the regional power grid and the system operation state results of the variable-speed pumped storage scheme in the regional power grid, calculate the system wind and light curtailment rates, wind and light curtailment rates of each node, average thermal power peak shaving depth, and annual thermal power peak shaving cycle numbers under the fixed-speed pumped storage scheme and the variable-speed pumped storage scheme respectively.

[0132] Among them, the calculation formula of the system wind and light curtailment rate is as follows:

[0133]

[0134] The calculation formula of the wind and light curtailment rate of each node is as follows:

[0135]

[0136] The calculation formula of the average thermal power peak shaving depth is as follows:

[0137]

[0138] The calculation formula of the annual thermal power peak shaving cycle number is as follows:

[0139]

[0140] Step S304: Compare the system wind and light curtailment rates, wind and light curtailment rates of each node, average thermal power peak shaving depth, and annual thermal power peak shaving cycle numbers under different pumped storage schemes to obtain the difference results of different pumped storage schemes.

[0141] In the process of specifically implementing step S304, the system curtailment rate of wind and solar power, the curtailment rate of wind and solar power at each node, the average peak shaving depth of thermal power, and the annual peak shaving cycle number of thermal power under the fixed-speed pumped storage scheme are compared with the system curtailment rate of wind and solar power, the curtailment rate of wind and solar power at each node, the average peak shaving depth of thermal power, and the annual peak shaving cycle number of thermal power under the variable-speed pumped storage scheme to obtain the difference results between the fixed-speed pumped storage scheme and the variable-speed pumped storage scheme.

[0142] As can be seen from the above, different pumped storage schemes in the time-series simulation process are used to calculate the above evaluation indicators for the system operation state results in the regional power grid, and the new energy consumption levels and thermal power peak shaving conditions of the regional power grid under different pumped storage schemes are obtained to compare the system performance under different pumped storage schemes, providing a reference for the technical and economic benefit evaluation of different variable-speed pumped storage projects in power grid applications.

[0143] Based on a production simulation method provided by an embodiment of the present invention, after obtaining time-series production data, the time-series production data is input into a production simulation system for time-series simulation. According to the output system operation state results of different pumped storage schemes in the regional power grid, the new energy consumption levels and thermal power peak shaving conditions of the regional power grid under different pumped storage schemes are obtained and compared, so as to obtain the difference results of different pumped storage schemes, and further provide a reference for improving the new energy consumption level of the system, reducing the potential benefits of deep peak shaving of thermal power, and the technical and economic benefit evaluation of variable-speed pumped storage projects in power grid applications.

[0144] Corresponding to a production simulation method shown in the above embodiment of the present invention, an embodiment of the present invention also correspondingly provides a production simulation system, as Figure 4 shown. The production simulation system includes: an acquisition module 41, a time-series simulation module 42, a obtaining module 43, and a comparison module 44.

[0145] The acquisition module 41 is used to acquire time-series production data of any regional power grid within a preset time range.

[0146] Among them, the time-series production data includes power grid data and power generation data. The power grid data includes grid topology, line parameters, and node loads. The power generation data includes new energy power generation, installed capacity, and power generation cost.

[0147] The time-series simulation module 42 is used to input the time-series production data into a pre-established production simulation system for hourly production simulation time-series simulation of the entire network, and output the system operation state results of different pumped storage schemes in the regional power grid.

[0148] Among them, the production simulation system is established from different types of pumped storage schemes and the corresponding operation strategies of the pumped storage schemes. The different types of pumped storage schemes and the corresponding operation strategies of the pumped storage schemes are preset. The different types of pumped storage schemes include fixed-speed pumped storage schemes and variable-speed pumped storage schemes.

[0149] An obtaining module 43, configured to obtain the new - energy consumption level and thermal - power peak - shaving condition of the regional power grid under different pumped - storage schemes according to the system operation - state results of different pumped - storage schemes in the regional power grid.

[0150] A comparison module 44, configured to compare the new - energy consumption level and thermal - power peak - shaving condition of the regional power grid under different pumped - storage schemes, and obtain the difference results of different pumped - storage schemes.

[0151] It should be noted that the specific principles and execution processes of each module in the production simulation and emulation system disclosed in the above - mentioned embodiments of the present invention are the same as those of the production simulation and emulation method of the present invention. For the corresponding parts, reference can be made to the production simulation and emulation method disclosed in the above - mentioned embodiments of the present invention, and details will not be elaborated here.

[0152] Based on a production simulation and emulation system provided by an embodiment of the present invention, the method includes: obtaining the time - series production data of any regional power grid within a preset time range, where the time - series production data includes grid data and power - generation data, the grid data includes grid topology, line parameters, and node loads, and the power - generation data includes new - energy power generation, installed capacity, and power - generation cost; inputting the time - series production data into a pre - established production simulation and emulation system for hour - level production simulation time - series emulation of the entire network, and outputting the system operation - state results of different pumped - storage schemes in the regional power grid, where the production simulation and emulation system is established from different types of pumped - storage schemes and the operation strategies corresponding to the pumped - storage schemes, different types of pumped - storage schemes and the operation strategies corresponding to the pumped - storage schemes are pre - set, and different types of pumped - storage schemes include fixed - speed pumped - storage schemes and variable - speed pumped - storage schemes; obtaining the new - energy consumption level and thermal - power peak - shaving condition of the regional power grid under different pumped - storage schemes according to the system operation - state results of different pumped - storage schemes in the regional power grid; comparing the new - energy consumption level and thermal - power peak - shaving condition of the regional power grid under different pumped - storage schemes, and obtaining the difference results of different pumped - storage schemes. In this solution, after obtaining the time - series production data, the time - series production data is input into the production simulation and emulation system for time - series emulation. According to the output system operation - state results of different pumped - storage schemes in the regional power grid, the new - energy consumption level and thermal - power peak - shaving condition of the regional power grid under different pumped - storage schemes are obtained and compared, so as to obtain the difference results of different pumped - storage schemes, and further provide a reference for improving the new - energy consumption level of the system, reducing the potential benefits of deep thermal - power peak - shaving, and evaluating the technical and economic benefits of variable - speed pumped - storage projects in power - grid applications.

[0153] Optionally, based on the above Figure 4 shown time - series emulation module 42, the time - series emulation module 42 includes:

[0154] An input unit, configured to input the time - series production data into a pre - established production simulation and emulation system.

[0155] A timing simulation unit, which is used to perform a full-network hourly production simulation timing simulation on the operating state of the regional power grid every hour throughout the year according to different types of pumped storage schemes set in advance and the corresponding operation strategies of the pumped storage schemes during the timing simulation of the production simulation system, so as to obtain the simulation operation results of different types of pumped storage schemes in the regional power grid.

[0156] An analysis unit, which is used to analyze the simulation operation results of different pumped storage schemes in the regional power grid according to the optimal DC power flow algorithm, so as to obtain the system operation state results of different pumped storage schemes in the regional power grid.

[0157] Optionally, based on the above Figure 4 The timing simulation unit shown, specifically used for:

[0158] During the timing simulation of the production simulation system, if the current pumped storage scheme is a constant-speed pumped storage scheme, perform a full-network hourly production simulation timing simulation on the operating state of the regional power grid every hour throughout the year according to the constant-speed pumped storage scheme and the corresponding operation strategy of the constant-speed pumped storage scheme, so as to obtain the simulation operation results of the constant-speed pumped storage scheme in the regional power grid.

[0159] Optionally, based on the above Figure 4 The timing simulation unit shown, also specifically used for:

[0160] During the timing simulation of the production simulation system, if the current pumped storage scheme is a variable-speed pumped storage scheme, perform a full-network hourly production simulation timing simulation on the operating state of the regional power grid every hour throughout the year according to the variable-speed pumped storage scheme and the corresponding operation strategy of the variable-speed pumped storage scheme, so as to obtain the simulation operation results of the variable-speed pumped storage scheme in the regional power grid.

[0161] Based on a production simulation system provided by an embodiment of the present invention, during the timing simulation of the production simulation system, perform a full-network hourly production simulation timing simulation on the operating state of the regional power grid every hour throughout the year according to different types of pumped storage schemes and the corresponding operation strategies of the pumped storage schemes, which provides a basis for subsequently obtaining the difference results of different pumped storage schemes, and further provides a reference for improving the new energy consumption level of the system, reducing the potential benefits of deep peak shaving of thermal power, and evaluating the technical and economic benefits of the variable-speed pumped storage project in the power grid application.

[0162] Optionally, based on the above Figure 4 The obtaining module 43 shown, specifically used for:

[0163] According to the system operation status results of different pumped - storage schemes in the target regional power grid, calculate the system wind - and - light curtailment rates, wind - and - light curtailment rates of each node, the average peak - shaving depth of thermal power, and the annual peak - shaving cycle number of thermal power under different pumped - storage schemes.

[0164] Correspondingly, the comparison module 44 is specifically configured to:

[0165] Compare the system wind - and - light curtailment rates, wind - and - light curtailment rates of each node, the average peak - shaving depth of thermal power, and the annual peak - shaving cycle number of thermal power under different pumped - storage schemes to obtain the difference results of different pumped - storage schemes.

[0166] Based on a production simulation and emulation system provided by an embodiment of the present invention, after obtaining the time - series production data, input the time - series production data into the production simulation and emulation system for time - series simulation. According to the output system operation status results of different pumped - storage schemes in the regional power grid, obtain the new - energy consumption levels and thermal - power peak - shaving conditions of the regional power grid under different pumped - storage schemes and compare them, so as to obtain the difference results of different pumped - storage schemes. Furthermore, it provides a reference for improving the new - energy consumption level of the system, reducing the potential benefits of deep thermal - power peak - shaving, and evaluating the technical and economic benefits of variable - speed pumped - storage projects in power - grid applications.

[0167] Each embodiment in this specification is described in a progressive manner. The same or similar parts among the embodiments can be referred to each other, and the differences between each embodiment and other embodiments are emphasized. In particular, for the system or system embodiments, since they are basically similar to the method embodiments, they are described relatively simply. The relevant parts can refer to the partial descriptions of the method embodiments. The systems and system embodiments described above are only illustrative. The units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed to multiple network units. Some or all of the modules can be selected according to actual needs to achieve the purpose of the solution of this embodiment. Those of ordinary skill in the art can understand and implement it without creative work.

[0168] Professionals can further realize that the units and algorithm steps of each example described in combination with the embodiments disclosed in this article can be implemented by electronic hardware, computer software, or a combination of the two. To clearly illustrate the interchangeability of hardware and software, the composition and steps of each example have been generally described according to functions in the above description. Whether these functions are executed in a hardware or software manner depends on the specific application and design constraints of the technical solution. Professionals can use different methods to implement the described functions for each specific application, but this implementation should not be considered to exceed the scope of the present invention.

[0169] The foregoing description of the disclosed embodiments enables those skilled in the art to practice or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A production simulation method, characterized in that, the method includes: Obtain the time-series production data of the power grid in any area within a preset time range. Among them, the time-series production data includes power grid data and power generation data. The power grid data includes grid topology, line parameters, and node loads. The power generation data includes new energy power generation, installed capacity, and power generation cost; Input the time-series production data into a pre-established production simulation system for hourly production simulation time-series simulation of the entire network, and output the system operation state results of different pumped storage schemes in the regional power grid. Among them, the production simulation system is established from different types of pumped storage schemes and the operation strategies corresponding to the pumped storage schemes. The different types of pumped storage schemes and the operation strategies corresponding to the pumped storage schemes are preset. The different types of pumped storage schemes include fixed-speed pumped storage schemes and variable-speed pumped storage schemes; According to the system operation state results of different pumped storage schemes in the regional power grid, calculate the system wind and light curtailment rates, wind and light curtailment rates of each node, average peak shaving depth of thermal power, and annual peak shaving cycle numbers of thermal power under different pumped storage schemes; Compare the system wind and light curtailment rates, wind and light curtailment rates of each node, average peak shaving depth of thermal power, and annual peak shaving cycle numbers of thermal power under different pumped storage schemes to obtain the difference results of different pumped storage schemes; Among them, the system operation state results are the operation state results of different pumped storage schemes in the regional power grid obtained by analyzing the simulation operation results of different pumped storage schemes in the regional power grid according to the optimal DC power flow algorithm; the optimal DC power flow algorithm takes cost optimization as the objective function; The objective function is , where x is the node number, N D is the number of nodes, f D x is the load shedding cost function, D a x is the actual supplied load at node x, D t x is the actual required load at node x, y is the generator set number, N g is the number of generator sets, f p y is the active power output cost function of generator set y, p g y is the active power output of the y-th generator set, z is the pumped-storage unit number, N PHS is the number of pumped-storage units, f p z is the active power output cost function of pumped-storage unit z, p g z is the generating active power output of the z-th pumped-storage unit, p p z is the pumping active power of the z-th pumped-storage unit.

2. The method according to claim 1, characterized in that, the step of inputting the time-series production data into a pre-established production simulation system for hourly production simulation time-series simulation of the entire network and outputting the system operation state results of different pumped storage schemes in the regional power grid includes: Input the time-series production data into a pre-established production simulation system; During the time-series simulation process of the production simulation system, according to the preset different types of pumped storage schemes and the operation strategies corresponding to the pumped storage schemes, conduct hourly production simulation time-series simulation of the operation state of the regional power grid every hour of the whole year to obtain the simulation operation results of different types of pumped storage schemes in the regional power grid; According to the optimal DC power flow algorithm, analyze the simulation operation results of different pumped storage schemes in the regional power grid to obtain the system operation state results of different pumped storage schemes in the regional power grid.

3. The method according to claim 2, characterized in that, the step of, during the time-series simulation process of the production simulation system, according to the preset different types of pumped storage schemes and the operation strategies corresponding to the pumped storage schemes, conduct hourly production simulation time-series simulation of the operation state of the regional power grid every hour of the whole year to obtain the simulation operation results of different types of pumped storage schemes in the regional power grid includes: During the time series simulation of the production simulation system, if the current pumped storage scheme is the constant-speed pumped storage scheme, according to the constant-speed pumped storage scheme and the corresponding operation strategy of the constant-speed pumped storage scheme, conduct a whole-network hourly production simulation time series simulation on the operation state of the regional power grid every hour throughout the year to obtain the simulation operation results of the constant-speed pumped storage scheme in the regional power grid.

4. The method according to claim 2, wherein, during the time series simulation of the production simulation system, according to different types of pumped storage schemes set in advance and the corresponding operation strategies of the pumped storage schemes, conduct a whole-network hourly production simulation time series simulation on the operation state of the regional power grid every hour throughout the year to obtain the simulation operation results of different types of pumped storage schemes in the regional power grid, including: during the time series simulation of the production simulation system, if the current pumped storage scheme is the variable-speed pumped storage scheme, according to the variable-speed pumped storage scheme and the corresponding operation strategy of the variable-speed pumped storage scheme, conduct a whole-network hourly production simulation time series simulation on the operation state of the regional power grid every hour throughout the year to obtain the simulation operation results of the variable-speed pumped storage scheme in the regional power grid.

5. A production simulation system, wherein, the system includes: an acquisition module, configured to acquire the time series production data of any regional power grid within a preset time range, wherein the time series production data includes power grid data and power generation data, the power grid data includes grid topology, line parameters, and node loads, and the power generation data includes new energy power generation, installed capacity, and power generation cost; a time series simulation module, configured to input the time series production data into a pre-established production simulation system for whole-network hourly production simulation time series simulation, and output the system operation state results of different pumped storage schemes in the regional power grid, wherein the production simulation system is established by different types of pumped storage schemes and the corresponding operation strategies of the pumped storage schemes, the different types of pumped storage schemes and the corresponding operation strategies of the pumped storage schemes are set in advance, and the different types of pumped storage schemes include constant-speed pumped storage schemes and variable-speed pumped storage schemes; a obtaining module, configured to calculate the system wind and light curtailment rates, the wind and light curtailment rates of each node, the average thermal power peak shaving depth, and the annual thermal power peak shaving cycle number under different pumped storage schemes according to the system operation state results of different pumped storage schemes in the regional power grid; a comparison module, configured to compare the system wind and light curtailment rates, the wind and light curtailment rates of each node, the average thermal power peak shaving depth, and the annual thermal power peak shaving cycle number under different pumped storage schemes to obtain the difference results of different pumped storage schemes; wherein, the system operation state results are the operation state results of different pumped storage schemes in the regional power grid obtained by analyzing the simulation operation results of different pumped storage schemes in the regional power grid according to the optimal DC power flow algorithm; the optimal DC power flow algorithm takes cost optimization as the objective function; The objective function is , where x is the node number, N D is the number of nodes, f D x is the load shedding cost function, D a x is the actual supplied load at node x, D t x is the actual required load at node x, y is the generator unit number, N g is the number of generator units, f p y is the active power output cost function of generator unit y, p g y is the active power output of the y-th generator unit, z is the pumped-storage unit number, N PHS is the number of pumped-storage units, f p z is the active power output cost function of pumped-storage unit z, p g z is the generating active power output of the z-th pumped-storage unit, p p z is the pumping active power of the z-th pumped-storage unit.

6. The system according to claim 5, wherein, the time series simulation module includes: An input unit for inputting the time-series production data into a pre-established production simulation system; A time-series simulation unit for performing a network-wide hourly production simulation time series simulation on the operating state of the regional power grid every hour of the whole year according to different types of pumped storage schemes set in advance and the operation strategies corresponding to the pumped storage schemes during the time series simulation process of the production simulation system, so as to obtain the simulation operation results of the different types of pumped storage schemes in the regional power grid; An analysis unit for analyzing the simulation operation results of the different pumped storage schemes in the regional power grid according to the optimal direct current power flow algorithm to obtain the system operation state results of the different pumped storage schemes in the regional power grid.

7. The system according to claim 6, wherein, the time-series simulation unit is specifically configured to: During the time series simulation process of the production simulation system, if the current pumped storage scheme is the fixed-speed pumped storage scheme, perform a network-wide hourly production simulation time series simulation on the operating state of the regional power grid every hour of the whole year according to the fixed-speed pumped storage scheme and the operation strategy corresponding to the fixed-speed pumped storage scheme, so as to obtain the simulation operation results of the fixed-speed pumped storage scheme in the regional power grid.

8. The system according to claim 6, wherein, the time-series simulation unit is further specifically configured to: During the time series simulation process of the production simulation system, if the current pumped storage scheme is the variable-speed pumped storage scheme, perform a network-wide hourly production simulation time series simulation on the operating state of the regional power grid every hour of the whole year according to the variable-speed pumped storage scheme and the operation strategy corresponding to the variable-speed pumped storage scheme, so as to obtain the simulation operation results of the variable-speed pumped storage scheme in the regional power grid.

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