Power system planning method and system considering additional cost of flexible resource scheduling

Abstract

The present invention relates to the technical field of power system energy storage planning, and specifically, to a power system planning method and system that considers the additional cost of flexible resource scheduling, including: obtaining the working data of each working unit in the power system; constructing a power system cost objective function based on the working data of each working unit, and at the same time constructing the constraints of the power system based on the power system cost objective function, and solving the weight coefficients of each cost in the power system cost objective function, combining the power system cost objective function with the constraints, solving the working data of each working unit in the power system, and performing flexible resource planning on the power system according to the solution results. In the construction of the objective function, the present invention fully considers the additional scheduling cost and carbon processing cost when the system flexibility is reduced, and achieves a comprehensive balance between economy and environmental protection.

Description

Technical Field

[0001] The present invention relates to the technical field of power system energy storage planning, and in particular to a power system planning method and system that considers additional costs of flexible resource scheduling. Background Art

[0002] With the energy transformation and large-scale access to renewable energy, the pace of building new power systems has accelerated, and the upgrading and reshaping of all aspects of power generation, transmission, distribution and use have brought new challenges to the power quality of the power system. The grid-connected power generation of a large number of new energy sources, the randomness and volatility of new energy sources have increased the demand for flexible resources in the power system. At present, traditional power system planning research has overly focused on the optimization of conventional economic indicators such as system operating costs, while ignoring the additional costs incurred by dispatching flexible resources when system flexibility is reduced; and traditional power system planning research has failed to fully consider the carbon costs incurred in the process of dispatching flexible resources, resulting in planning results that are difficult to adapt to increasingly stringent carbon emission control requirements; in addition, in terms of the site selection and regional allocation of flexible resources, due to the lack of consideration of additional dispatching costs, the practicality and economy of the planning scheme are affected, affecting the overall operating efficiency and reliability of the system. Summary of the invention

[0003] The purpose of the present invention is to provide an electric power system planning method and system that takes into account the additional cost of flexible resource scheduling. In the construction of the objective function, the additional scheduling cost and carbon treatment cost when the system flexibility is reduced are fully considered, which effectively solves the shortcomings of traditional planning methods.

[0004] The present invention is achieved through the following technical solutions: A power system planning method considering the additional cost of flexible resource dispatching includes the following steps: Obtain the working data of each working unit in the power system; Constructing a power system cost objective function based on the working data of each working unit, constructing power system constraints based on the power system cost objective function, and solving the weight coefficients of various costs in the power system cost objective function, wherein the power system cost objective function takes minimization of the overall system cost as the optimization goal, and the power system cost objective function takes into account the additional cost of the power system and the additional carbon treatment cost; Combining the power system cost objective function with the constraints, the working data of each working unit in the power system is solved, and flexibility resource planning is performed on the power system based on the solution results.

[0005] Optionally, the power system cost objective function is calculated as follows:

[0006] in, is the total power system cost; the cost of investing in planning flexibility resources; The cost of running the system; The risk cost of insufficient flexibility; The additional cost incurred by scheduling flexible resources due to insufficient flexibility of the system; The additional carbon treatment costs incurred by the system due to insufficient flexibility in dispatching flexible resources. , , , , They are the optimization weight coefficients of flexibility resource investment cost, system operation cost, cost caused by the risk of insufficient flexibility, additional cost of flexibility resource scheduling, and additional carbon treatment cost of flexibility resource scheduling.

[0007] Optionally, the additional cost is calculated as follows:

[0008]

[0009]

[0010]

[0011]

[0012]

[0013] in, Additional costs for thermal power units to respond to flexibility adjustments, Additional costs for nuclear power plants to respond to flexibility adjustments, Additional costs for hydro units to respond to flexibility adjustments, Additional costs for storage to respond to flexibility regulation, Additional costs for load-side resource response flexibility regulation, For thermal power units participating in flexibility regulation i The output increase, I is the total number of thermal power units participating in flexibility regulation, For nuclear power units participating in flexibility regulation c The output increase, C is the total number of nuclear power units participating in flexibility regulation, , are the climbing rate, For hydroelectric unitsj The cost coefficient of the response flexibility adjustment, For hydroelectric units j The output increase when participating in flexibility regulation, For hydroelectric units j Response flexibility adjustment time, J is the total number of hydropower units participating in flexibility regulation, For energy storage k The compensation cost coefficient given by the response flexibility adjustment dispatch, For energy storage k The output when participating in flexibility adjustment, For energy storage k Response flexibility adjustment time, K is the total amount of energy storage participating in flexibility regulation, is the capacity cost of interruptible load participating in flexibility regulation, Energy cost of participating in flexibility regulation for interrupted loads, Interruptible load Response flexibility adjusts capacity, Interruptible load Cost coefficient per unit capacity, Interruptible load The unit energy cost coefficient, Interruptible load l Time to respond to flexibility adjustments.

[0014] Optionally, the additional carbon treatment cost is calculated as follows:

[0015] in, , Respectively i Thermal power unit, y The output of nuclear power units participating in flexibility regulation, , Respectively i Thermal power unit, y Carbon emission factors of nuclear power units, They are the number of thermal power units and nuclear power units participating in flexibility regulation respectively.

[0016] Optionally, the investment cost is calculated as follows:

[0017] in, The investment cost of all planned thermal power units to be transformed is is the investment cost of all planned hydropower units, The investment cost for all interruptible loads planned, The investment cost of all planned energy storage.

[0018] Optionally, the running cost is calculated as follows:

[0019]

[0020]

[0021] in, , They are the output cost of all units and the cost of all abandoned electricity from new energy sources. , , , , , , and They are the unit output costs of thermal power, nuclear power, hydropower, wind power, photovoltaic power, energy storage, external power supply and planned energy storage in the system. , , , , , , and They are respectively The output values ​​of all thermal power units, nuclear power units, hydropower units, wind farms, photovoltaic power stations, energy storage systems, external power supplies and planned energy storage systems at all times. , for Moment The output value of each thermal power unit; , are the unit curtailment costs of wind power and photovoltaic power, and They are Moment wind farm and The predicted output of each photovoltaic power station, and They are Moment wind farm and The operating simulation output of a photovoltaic power station.

[0022] Optionally, the risk cost is calculated as follows:

[0023]

[0024]

[0025]

[0026]

[0027] in, and are the unit loss costs when upward and downward flexibility is insufficient, and Respectively Always adjust the expected value of the flexibility deficit upward and downward, and Respectively Insufficient flexibility to adjust up and down at any time. for Net load demand at the moment, for The net load demand forecasted at any given moment, and Respectively The amount of upward and downward peak-shaving resources available in the system at any given moment, For the The total load value in the system at the moment, , and Respectively The total predicted load, predicted wind power output and predicted photovoltaic output of the system at the moment, and Respectively The probability function of insufficient flexibility is adjusted upward and downward at all times.

[0028] Optionally, the constraints include: power balance constraints, system reserve capacity constraints, unit output limit constraints, power transmission constraints, energy storage constraints and line transmission capacity constraints.

[0029] Optionally, the weight coefficients of the various costs in the power system cost objective function are calculated using the following specific calculation formula:

[0030]

[0031]

[0032]

[0033] in, A is the judgment matrix, each element in the matrix is the relative importance between the targets; the specific value of each element in the judgment matrix A is determined by the 1-9 scaling method; is the value of each element normalized by row; It is the sum of the elements added by column after normalization; is the weight coefficient of each objective function.

[0034] A power system planning system considering the additional cost of flexible resource scheduling includes: a working data acquisition module, an objective function calculation module, a system constraint calculation module, an objective function fitting module and a planning module connected in sequence; The working data acquisition module acquires working data of each working unit in the power system; The objective function calculation module constructs a power system cost objective function based on the working data of each working unit, wherein the power system cost objective function takes minimization of the overall system cost as an optimization goal, and the power system cost objective function takes into account the additional cost of the power system and the additional carbon treatment cost; The system constraint calculation module constructs the constraint conditions of the power system based on the power system cost objective function; The objective function fitting module solves the weight coefficients of various costs in the power system cost objective function; The planning module solves the working data of each working unit in the power system in combination with the power system cost objective function and constraint conditions, and performs flexibility resource planning on the power system according to the solution results.

[0035] The technical solution of the present invention has at least the following advantages and beneficial effects: The present invention obtains the actual operating data of each working unit in the power system to establish a system model that is closer to reality. On this basis, the constructed power system cost objective function takes minimizing the overall system cost as the optimization goal, and by solving the weight coefficients of different costs, it achieves a comprehensive consideration of economy and environmental protection. In addition, the present invention fully considers the actual needs of system operation in the setting of constraints, ensures the feasibility of the flexibility resource planning scheme, and significantly improves the rationality of the site selection and regional allocation of flexibility resources by incorporating the additional cost of flexible resource scheduling into the planning process, providing strong support for the efficient operation of the power system. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] Figure 1 A flow chart of a power system planning method considering the additional cost of flexible resource scheduling provided by the present invention; Figure 2 This is a schematic diagram of the additional cost calculation principle for flexible dispatch of thermal power provided by the present invention. DETAILED DESCRIPTION

[0037] In order to make the purpose, technical solutions and advantages of the present invention clearer, the technical solutions of the present invention will be clearly and completely described below in conjunction with the drawings in the present invention. Obviously, what is described is only a part of the present invention, not all of it. Generally, the components of the present invention described and shown in the drawings here can be arranged and designed in various different configurations.

[0038] like Figure 1 As shown, the present invention provides one embodiment: a power system planning method considering the additional cost of flexible resource scheduling, the steps of the method comprising: Obtain the working data of each working unit in the power system; Constructing a power system cost objective function based on the working data of each working unit, constructing power system constraints based on the power system cost objective function, and solving the weight coefficients of various costs in the power system cost objective function, wherein the power system cost objective function takes minimization of the overall system cost as the optimization goal, and the power system cost objective function takes into account the additional cost of the power system and the additional carbon treatment cost; Combining the power system cost objective function with the constraints, the working data of each working unit in the power system is solved, and flexibility resource planning is performed on the power system based on the solution results.

[0039] In this embodiment, the working data of each working unit in the power system is obtained, and the power system cost objective function is constructed according to the working cost data, power data and load power data corresponding to each working unit, wherein the types of the working units include: thermal power units, hydropower units, nuclear power units, wind power units, photovoltaic units and energy storage units; the working data include: working cost data, power data and load power data.

[0040] In the specific implementation of this embodiment, the power system cost objective function is calculated as follows:

[0041] in, is the total power system cost; the cost of investing in planning flexibility resources; The cost of running the system; The risk cost of insufficient flexibility; The additional cost incurred by scheduling flexible resources due to insufficient flexibility of the system; The additional carbon treatment costs incurred by the system due to insufficient flexibility in dispatching flexible resources. , , , , They are the optimization weight coefficients of flexibility resource investment cost, system operation cost, cost caused by the risk of insufficient flexibility, additional cost of flexibility resource scheduling, and additional carbon treatment cost of flexibility resource scheduling.

[0042] Based on this objective function, the additional cost is calculated as follows:

[0043] In practice, the output characteristics of thermal power units and nuclear power units in the above formula are similar, so the additional cost of flexibility adjustment is calculated using thermal power units as an example. The principle is as follows: Figure 2 As shown in the figure: Assume that the unit output before the thermal power unit participates in flexibility regulation is The initial ramp rate is At this time, the dispatcher issues an instruction requiring the thermal power units to participate in flexibility adjustment. Internal output reaches , if you want to use the original climbing rate Climbing takes time The unit can achieve the output required by the dispatch Therefore, the thermal power unit needs to increase the ramp rate to , to meet the flexibility adjustment needs, so the additional cost of flexibility adjustment of thermal power units can be calculated by the following formula:

[0044]

[0045] in, The extra work done by thermal power units to respond to flexibility regulation needs; The unit power cost of increasing the ramp rate for thermal power units; The output of the thermal power units before participating in flexibility adjustment; is the initial moment of thermal power unit and flexibility adjustment; is the original ramp rate of the thermal power unit; Adjust target power for thermal power units’ flexibility; It is the actual ramp rate of thermal power units participating in flexibility regulation; For thermal power units with original ramp rate Climbing, Power achieved over time; The thermal power unit climbs to the target power at the original ramp rate The time taken.

[0046] Therefore, the additional cost of flexibility adjustment of thermal power units is:

[0047] in, For thermal power units participating in flexibility regulation i Output increase value; I is the total number of thermal power units participating in flexibility regulation.

[0048] Since the time required for the hydropower unit to adjust the output is short, the present invention ignores the time spent on adjusting the output of the hydropower unit and assumes that the hydropower unit can instantly reach the output required by the dispatch. Therefore, the additional cost of the hydropower unit response flexibility adjustment is:

[0049] The additional cost of energy storage response flexibility adjustment is mainly the compensation cost given by the system calling energy storage, which can be calculated by the following formula:

[0050] When calling interruptible loads, the compensation for interruptible loads generally includes two parts: capacity cost and energy cost, which can be calculated by the following formula:

[0051] in, Additional costs for thermal power units to respond to flexibility adjustments, Additional costs for nuclear power plants to respond to flexibility adjustments, Additional costs for hydro units to respond to flexibility adjustments, Additional costs for storage to respond to flexibility regulation, The additional costs incurred by the flexible response of load-side resources, including the compensation costs for the flexible response of electric vehicles, interruptible loads, etc. For thermal power units participating in flexibility regulation i The output increase, I is the total number of thermal power units participating in flexibility regulation, , are the climbing rate, For hydroelectric units j The cost coefficient of the response flexibility adjustment, For hydroelectric units j The output increase when participating in flexibility regulation, For hydroelectric units j Response flexibility adjustment time, J is the total number of hydropower units participating in flexibility regulation, For energy storage k The compensation cost coefficient given by the response flexibility adjustment dispatch, For energy storagek The output when participating in flexibility adjustment, For energy storage k Response flexibility adjustment time, K is the total amount of energy storage participating in flexibility regulation, is the capacity cost of interruptible load participating in flexibility regulation, Energy cost of participating in flexibility regulation for interrupted loads, Interruptible load l Response flexibility adjusts capacity, Interruptible load l Cost coefficient per unit capacity, Interruptible load l The unit energy cost coefficient, Interruptible load l Time to respond to flexibility adjustments.

[0052] On this basis, the additional carbon treatment cost is calculated as follows:

[0053] in, , Respectively i Thermal power unit, y The output of nuclear power units participating in flexibility regulation, , Respectively i Thermal power unit, y Carbon emission factors of nuclear power units, i , y They are the number of thermal power units and nuclear power units participating in flexibility regulation respectively. It is mainly generated by the units that produce carbon emissions participating in flexibility adjustment, mainly including thermal power units, nuclear power units, etc.

[0054] On this basis, the investment cost is calculated as follows:

[0055] in, The investment cost of all planned thermal power units to be transformed is is the investment cost of all planned hydropower units, The investment cost for all interruptible loads planned, The investment cost of all planned energy storage.

[0056] The system operating cost mainly considers the output cost of each type of unit and the cost of abandoned electricity of new energy, as shown in the following formula:

[0057]

[0058]

[0059] in, , They are the output cost of all units and the cost of all abandoned electricity from new energy sources. , , , , , , and They are the unit output costs of thermal power, nuclear power, hydropower, wind power, photovoltaic power, energy storage, external power supply and planned energy storage in the system. , , , , , , and They are respectively The output values ​​of all thermal power units, nuclear power units, hydropower units, wind farms, photovoltaic power stations, energy storage systems, external power supplies and planned energy storage systems at all times. , for Moment The output value of each thermal power unit; , are the unit curtailment costs of wind power and photovoltaic power, and They are Moment wind farm and The predicted output of each photovoltaic power station, and They are Moment wind farm and The simulated output of the operation of a photovoltaic power station. Among them, energy storage and external power transmission have positive and negative values. Positive values ​​indicate discharge or power transmission from outside the area, and negative values ​​indicate charging or power transmission outside the area.

[0060] The risk cost of insufficient flexibility is the expected value of potential losses caused by the random fluctuation of flexibility demand exceeding the upper and lower thresholds of the flexibility boundary determined by the operation strategy. The risk of insufficient flexibility is divided into the risk of insufficient upward flexibility and the risk of insufficient downward flexibility. When the upward flexibility is insufficient, some loads will be restricted or cut off, and when the downward flexibility is insufficient, renewable energy units and even conventional power generation units will be cut off. Therefore, the loss of load shedding when the upward flexibility is insufficient is set to ¥ / MW, the loss of cutting the machine when the downward flexibility is insufficient is ¥ / MW. The risk cost of insufficient flexibility is converted from the expected value of the insufficient flexibility corresponding to the probability of insufficient flexibility, as shown in the following formula:

[0061]

[0062]

[0063]

[0064]

[0065] in, and are the unit loss costs when upward and downward flexibility is insufficient, and Respectively Always adjust the expected value of the flexibility deficit upward and downward, and Respectively Insufficient flexibility to adjust up and down at any time. for Net load demand at the moment, for The net load demand forecasted at any given moment, and Respectively The amount of upward and downward peak-shaving resources available in the system at any given moment, For the The total load value in the system at the moment, , and Respectively The total predicted load, predicted wind power output and predicted photovoltaic output of the system at the moment, and Respectively The probability function of insufficient flexibility for upward and downward adjustment at any given moment is actually the probability density function of the predicted load. , predict wind power output probability density function , and the predicted photovoltaic output probability density function The joint density function of .

[0066] Furthermore, the flexibility demand information of the power system is obtained, and combined with the system flexibility supply information, the conventional operation constraints and flexibility constraints of the power system are constructed; the constraints include power balance, system reserve capacity, unit output limitation, external power transmission, energy storage constraints, line transmission capacity constraints, etc.

[0067] Specifically, the weight coefficient of each cost in the objective function is calculated according to the preset weight coefficient solution algorithm. The weight coefficient solution algorithm is as follows: Construct a judgment matrix A and determine the value of each element in the matrix A according to the 1-9 scaling method:

[0068] Normalize the matrix A:

[0069] Solve using the summation method :

[0070] right After normalization, the weight of the objective function is obtained:

[0071] The weights are checked for consistency. If they do not meet the preset requirements, the matrix A is adjusted and the weights are re-solved until the weights meet the requirements of the consistency check, and the weights corresponding to the objective function are obtained. The objective function of the power system is solved using a preset function solver in combination with the constraints, and the flexibility resources of the power system are planned based on the solution results.

[0072] In implementation, the present invention also provides another embodiment: a power system planning system considering the additional cost of flexible resource scheduling, comprising: a working data acquisition module, an objective function calculation module, a system constraint calculation module, an objective function fitting module and a planning module connected in sequence; The working data acquisition module acquires working data of each working unit in the power system; The objective function calculation module constructs a power system cost objective function based on the working data of each working unit, wherein the power system cost objective function takes minimization of the overall system cost as an optimization goal, and the power system cost objective function takes into account the additional cost of the power system and the additional carbon treatment cost; The system constraint calculation module constructs the constraint conditions of the power system based on the power system cost objective function; The objective function fitting module solves the weight coefficients of various costs in the power system cost objective function; The planning module solves the working data of each working unit in the power system in combination with the power system cost objective function and constraint conditions, and performs flexibility resource planning on the power system according to the solution results.

[0073] The above is only the preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A power system planning method considering the additional cost of flexible resource scheduling, characterized in that: The steps of the method include: Obtain the working data of each working unit in the power system; Constructing a power system cost objective function based on the working data of each working unit, constructing power system constraints based on the power system cost objective function, and solving the weight coefficients of various costs in the power system cost objective function, wherein the power system cost objective function takes minimization of the overall system cost as the optimization goal, and the power system cost objective function takes into account the additional cost of the power system and the additional carbon treatment cost; Combining the power system cost objective function with the constraints, the working data of each working unit in the power system is solved, and flexibility resource planning is performed on the power system based on the solution results.

2. The power system planning method considering the additional cost of flexible resource scheduling according to claim 1 is characterized in that: The power system cost objective function is calculated as follows: in, is the total power system cost; the cost of investing in planning flexibility resources; The cost of running the system; The risk cost of insufficient flexibility; The additional cost incurred by scheduling flexible resources due to insufficient flexibility of the system; The additional carbon treatment costs incurred by the system due to insufficient flexibility in dispatching flexible resources. , , , , They are the optimization weight coefficients of flexibility resource investment cost, system operation cost, cost caused by the risk of insufficient flexibility, additional cost of flexibility resource scheduling, and additional carbon treatment cost of flexibility resource scheduling.

3. The power system planning method considering the additional cost of flexible resource scheduling according to claim 2 is characterized in that: The additional cost is calculated as follows: in, Additional costs for thermal power units to respond to flexibility adjustments, Additional costs for nuclear power plants to respond to flexibility adjustments, Additional costs for hydro units to respond to flexibility adjustments, Additional costs for storage to respond to flexibility regulation, Additional costs for load-side resource response flexibility regulation, For thermal power units participating in flexibility regulation i The output increase, I is the total number of thermal power units participating in flexibility regulation, For nuclear power units participating in flexibility regulation c The output increase, C is the total number of nuclear power units participating in flexibility regulation, , are the climbing rate, For hydroelectric units j The cost coefficient of the response flexibility adjustment, For hydroelectric units j The output increase when participating in flexibility regulation, For hydroelectric units j Response flexibility adjustment time, J is the total number of hydropower units participating in flexibility regulation, For energy storage k The compensation cost coefficient given by the response flexibility adjustment dispatch, For energy storage k The output when participating in flexibility adjustment, For energy storage k Response flexibility adjustment time, K is the total amount of energy storage participating in flexibility regulation, is the capacity cost of interruptible load participating in flexibility regulation, Energy cost of participating in flexibility regulation for interrupted loads, Interruptible load Response flexibility adjusts capacity, Interruptible load Cost coefficient per unit capacity, Interruptible load The unit energy cost coefficient, Interruptible load l Time to respond to flexibility adjustments.

4. The power system planning method considering the additional cost of flexible resource scheduling according to claim 3 is characterized in that: The additional carbon treatment cost is calculated as follows: in, , Respectively i Thermal power unit, y The output of nuclear power units participating in flexibility regulation, , Respectively i Thermal power unit, y Carbon emission factors of nuclear power units, They are the number of thermal power units and nuclear power units participating in flexibility regulation respectively.

5. The power system planning method considering the additional cost of flexible resource scheduling according to claim 4 is characterized in that: The investment cost is calculated as follows: in, The investment cost of all planned thermal power units to be transformed is is the investment cost of all planned hydropower units, The investment cost for all interruptible loads planned, The investment cost of all planned energy storage.

6. The power system planning method considering the additional cost of flexible resource scheduling according to claim 5 is characterized in that: The operating cost is calculated as follows: in, , They are the output cost of all units and the cost of all abandoned electricity from new energy sources. , , , , , , and They are the unit output costs of thermal power, nuclear power, hydropower, wind power, photovoltaic power, energy storage, external power supply and planned energy storage in the system. , , , , , , and They are respectively The output values ​​of all thermal power units, nuclear power units, hydropower units, wind farms, photovoltaic power stations, energy storage systems, external power supplies and planned energy storage systems at all times. , for Moment The output value of each thermal power unit; , are the unit curtailment costs of wind power and photovoltaic power, and They are Moment wind farm and The predicted output of each photovoltaic power station, and They are Moment wind farm and The operating simulation output of a photovoltaic power station.

7. The power system planning method considering the additional cost of flexible resource scheduling according to claim 6 is characterized in that: The risk cost is calculated as follows: in, and are the unit loss costs when upward and downward flexibility is insufficient, and Respectively Always adjust the expected value of the flexibility deficit upward and downward, and Respectively Insufficient flexibility to adjust up and down at any time. for Net load demand at the moment, for The net load demand forecasted at any given moment, and Respectively The amount of upward and downward peak-shaving resources available in the system at any given moment. For the The total load value in the system at the moment, , and Respectively The total predicted load, predicted wind power output and predicted photovoltaic output of the system at the moment, and Respectively The probability function of insufficient flexibility is adjusted upward and downward at all times.

8. The power system planning method considering the additional cost of flexible resource scheduling according to claim 7 is characterized in that: The constraints include: power balance constraints, system reserve capacity constraints, unit output limit constraints, external power transmission constraints, energy storage constraints and line transmission capacity constraints.

9. The power system planning method considering the additional cost of flexible resource scheduling according to claim 8 is characterized in that: The specific calculation formula for solving the weight coefficient of each cost in the power system cost objective function is: in, A is the judgment matrix, each element in the matrix is the relative importance between the targets; the specific value of each element in the judgment matrix A is determined by the 1-9 scaling method; is the value of each element normalized by row; It is the sum of the elements added by column after normalization; is the weight coefficient of each objective function.

10. A power system planning system considering the additional cost of flexible resource scheduling, characterized in that: include: A working data acquisition module, an objective function calculation module, a system constraint calculation module, an objective function fitting module and a planning module connected in sequence; The working data acquisition module acquires working data of each working unit in the power system; The objective function calculation module constructs a power system cost objective function based on the working data of each working unit, wherein the power system cost objective function takes minimization of the overall system cost as an optimization goal, and the power system cost objective function takes into account the additional cost of the power system and the additional carbon treatment cost; The system constraint calculation module constructs the constraint conditions of the power system based on the power system cost objective function; The objective function fitting module solves the weight coefficients of various costs in the power system cost objective function; The planning module solves the working data of each working unit in the power system in combination with the power system cost objective function and constraint conditions, and performs flexibility resource planning on the power system according to the solution results.

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