Capacity cost compensation method and system for multiple types of power supplies

Abstract

The invention discloses a capacity cost compensation method and system for multiple types of power supplies, and the method comprises the following steps: collecting various parameters of a generator set, and forming an input data set for capacity compensation calculation; calculating various power capacity costs according to the generator set data obtained in the step 1; secondly, the initial capacity of each generator set is evaluated according to the condition of the generator set, then the initial capacity is corrected in combination with the constraint condition formed by the data in the first step, the sufficient capacity is obtained, and then the sufficient capacity is converted according to the demand balance principle to obtain the compensation capacity; and calculating the capacity compensation amount of each power supply according to the supplementary capacity and the capacity cost obtained in the step 2. Through reasonable determination of the capacity electricity price, scientific verification of the compensation capacity and accurate settlement of the compensation cost, unified evaluation and fair compensation of various different power supply types are realized, so that scientificity and fairness of a capacity compensation mechanism are improved.

Description

Technical Field

[0001] This invention belongs to the technical field of the electricity market, specifically relating to a capacity cost compensation method and system for multiple types of power sources. Background Technology

[0002] In power system operation, the core function of the capacity cost compensation mechanism is to ensure that power source investors can recover fixed costs, thereby maintaining an adequate level of system capacity. Traditional compensation methods mainly target conventional and controllable power sources such as coal-fired and gas-fired power, allocating compensation costs based on their installed capacity and operating characteristics, with less attention paid to new power sources such as renewable energy and energy storage. However, with the large-scale integration of renewable energy generation such as wind and solar power, the power source structure is becoming increasingly diversified, and capacity compensation methods solely focused on conventional power sources can no longer meet actual needs.

[0003] The intermittent and volatile nature of new energy sources means their capacity value is not proportional to their installed capacity; simply using rated capacity as the basis for compensation overestimates their guarantee capabilities. Meanwhile, traditional power sources such as thermal power face difficulties in recovering capacity costs due to declining utilization hours, and the lack of reasonable compensation will affect their supporting role in the system. While new flexible resources such as energy storage and grid-side peak-shaving units can improve system reliability, existing mechanisms lack scientific quantification and compensation arrangements for their capacity value. These problems result in existing capacity compensation mechanisms having insufficient universality, incentive distortions, and a lack of fairness in environments with multiple power sources coexisting.

[0004] Therefore, a capacity cost compensation method for multiple power supply types needs to be developed to solve the above-mentioned technical problems. Summary of the Invention

[0005] One objective of this invention is to address the shortcomings of existing technologies by providing a capacity cost compensation method for multiple types of power sources. This method achieves unified evaluation and fair compensation for different power source types, such as coal-fired power, gas-fired power, hydropower, wind power, photovoltaic power, and energy storage, through reasonable determination of capacity electricity price, scientific verification of compensation capacity, and accurate settlement of compensation fees, thereby improving the scientific nature and fairness of the capacity compensation mechanism.

[0006] To solve the above-mentioned technical problems, the present invention adopts the following technical solution: A capacity cost compensation method for multiple power supply types includes the following steps: Step 1: Collect various parameters of the generator set to form the input dataset for capacity compensation calculation; Step 2: Calculate the cost of various power supply capacities based on the generator set data in Step 1. Step 3: Evaluate the initial capacity of each generator set based on its condition. Then, combine the constraints formed by the dataset in Step 1 to correct the initial capacity and obtain the surplus capacity. Finally, calculate the compensation capacity based on the demand balance principle. Step 4: Calculate the capacity compensation amount for each type of power supply based on the supplementary capacity and the capacity cost obtained in Step 2.

[0007] Furthermore, in step 1, the collected generator set parameters include economic parameters and technical parameters. The economic parameters include installed capacity, capacity cost, and planned investment payback period, while the technical parameters include availability, plant power consumption rate, maintenance time percentage, and forced outage.

[0008] Furthermore, the calculation method for capacity electricity price in step 2 is as follows: The cost-plus pricing method based on long-term marginal capacity cost is adopted, which discounts the investment cost of marginal units into an equivalent annuity using the actual discount rate, thereby obtaining the capacity price:

[0009] In the formula: p c It is a capacity-based electricity price; T This is the investment recovery period; α For return on investment; β This is the actual discount rate; K c This refers to the unit capacity investment cost of marginal generator sets.

[0010] Furthermore, in step 3, when conducting the preliminary capacity assessment, the initial capacity of each type of generator unit is calculated based on the rated installed capacity of the generator unit. The types of generator units include thermal power units, hydropower units, nuclear power units, and new energy units.

[0011] Furthermore, the preliminary capacity calculation method for thermal power units is as follows: Based on the fuel supply data for the past m years, the minimum annual average available capacity is taken as the initial capacity of the unit. The calculation formula is as follows:

[0012]

[0013]

[0014] In the formula: Q 0,h This represents the initial capacity of the thermal power unit. d h The main fuel availability rate of thermal power units within the calculation period; Qa,h This refers to the maximum power output of a thermal power unit operating with its primary fuel. Q b,h This refers to the maximum power output of a thermal power unit operating on alternative fuels. L h,s,t Due to insufficient fuel supply, thermal power units are experiencing periodicity issues. s Inner t Maximum output limit per hour; U h,s,t For the unit in the cycle s No. t The state variable for each hour; T s For period s Total duration.

[0015] Furthermore, the preliminary capacity calculation method for hydropower units is as follows: The available capacity of the generating units is assessed by statistically analyzing historical hydrological data and considering the power output differences between wet and dry years. The calculation formula is as follows:

[0016] In the formula: H 0,k This represents the initial capacity of the hydroelectric generator unit. H a,k This is the maximum operating power of the unit; H b,k This refers to non-adjustable output, primarily reflecting the constraints of hydropower stations without adjustable capacity. H c,k To ensure adjustable power output, reflecting the reservoir's regulation capacity; Non-adjustable output H b,k Further calculation is performed using the following formula:

[0017] In the formula: Q m,k This represents the multi-year average available flow rate during the dry season. or k The power generation efficiency of the hydroelectric generator unit; Adjustable output H c,k Further calculation is performed using the following formula:

[0018] In the formula: D max This represents the system's maximum annual load. D 0 represents the lower limit of the system load under fully regulated hydropower support; Eu,k For hydroelectric generator units k Regulating energy; E max,k This represents the upper limit of the annual power generation that the unit can generate at maximum power. Q j This refers to the upstream water flow rate; E s,k The initial energy of the reservoir; W a,k This represents the average annual available inflow.

[0019] Furthermore, the preliminary capacity calculation method for nuclear power units is as follows: Based on historical operational data, select the year prior to the calculation year. m The annual fuel availability rate is calculated by taking the minimum of the annual average available capacity as the initial capacity of the unit. The formula is as follows:

[0020]

[0021]

[0022] In the formula: Q 0,n For nuclear power units n The initial capacity; Q m,n This is the maximum capacity of the unit under full-power operation conditions; d n Fuel availability of the unit; i n,y For the first y Annual fuel availability indicators; L n,y,t In the first y The year's first t The maximum output per hour due to fuel constraints; U n,y,t The value is 1 if fuel is insufficient, and 0 otherwise. T y Let y be the total duration of year y.

[0023] Furthermore, the preliminary capacity calculation method for new energy power units is as follows: The peak load factor method is used to estimate the initial capacity of wind and solar power units. This involves comparing the average output of new energy units during the system's peak load period with their historical annual average output, and taking the minimum of the two as the initial capacity. The calculation formula is as follows:

[0024] In the formula: Q 0,xFor new energy generator sets x The initial capacity; Q a,x For wind farms / photovoltaic power stations m Minimum average output for each year; Q p,x This represents the minimum average output of each typical load curve in the system during the peak load period, corresponding to the wind farm / photovoltaic power station.

[0025] Furthermore, the method for calculating ample capacity is as follows: Based on the initial capacity, and taking into account the power consumption of the generator sets and the annual planned maintenance information obtained in step 1, the initial capacity is adjusted to obtain the following preliminary surplus capacity:

[0026] In the formula: Q c,i For the unit j The initial ample capacity; Q 0,j For the unit j The initial capacity; 1,j This is a reduction factor related to the unit's electrical ratio; 2,j This is a reduction factor related to the unit's annual maintenance plan; The Monte Carlo method is used to simulate the random outage process of generator units to correct the initial surplus capacity and obtain the surplus capacity. The method is as follows: (3) Set the number of sampling times t =l, randomly generated within the interval [0,1]. M Let be a random number, denoted as . x j,t in, j =1,2,..., M , M This represents the total number of generator sets in the system. (4) Obtain the generator set j During the period t state variables Z j,t , represented as:

[0027] In the formula: 1 represents normal, and 0 represents fault; j For the unit j Forced shutdown rate; (3) Determine the current sampling time t Is it equal to TIf they are equal, the sampling ends and proceed to step (4); if they are not equal, then let t = t +1, and return to step (2) to continue execution; (4) Calculate the generator set based on the available capacity at each time. j The ample capacity is:

[0028] In the formula: Q sc，j For the unit j Ample capacity under Monte Carlo simulation; T To determine the number of time periods within the evaluation period.

[0029] Another object of the present invention is to provide a system for implementing the above-described capacity cost compensation method for multiple power supply types, comprising: The data acquisition module is used to collect various parameters of the generator set and form the input dataset for capacity compensation calculation; The power capacity cost calculation module is used to calculate the cost of various power capacity based on the generator set data in the dataset obtained by the data acquisition module. The compensation capacity calculation module is used to evaluate the initial capacity of various generator sets based on their conditions. Then, combined with the constraints formed by the dataset, the initial capacity is corrected to obtain the surplus capacity. Finally, based on the demand balance principle, the surplus capacity is converted to obtain the compensation capacity. The capacity compensation amount calculation module is used to calculate the capacity compensation amount for various types of power supplies based on the capacity cost obtained from the supplementary capacity and power supply capacity cost calculation modules.

[0030] Compared with existing technologies, the beneficial effects of this invention are as follows: This invention improves the scientific rigor and fairness of the capacity compensation mechanism through the reasonable determination of capacity pricing, the scientific verification of compensation capacity, and the accurate settlement of compensation fees. Specifically, in the capacity pricing stage, considering the construction costs, investment recovery periods, and discount parameters of different power sources, it achieves differentiated cost measurement for power sources such as coal-fired power, gas-fired power, hydropower, wind power, photovoltaic power, and energy storage. In the compensation capacity verification stage, combining initial capacity assessment, ample capacity calculation, and peak load conversion, it accurately reflects the contribution of various power sources to system reliability. In the fee settlement stage, the fee allocation is completed according to the principle of "compensation capacity × capacity pricing," ensuring both the recovery of conventional power source capacity costs and reflecting the actual capacity value of new energy and energy storage. This method avoids the problems of insufficient universality and incentive imbalance in traditional compensation mechanisms, helps promote the coordinated development of multiple power sources, ensures system power supply security, and maintains the stable operation of the electricity market. Attached Figure Description

[0031] Figure 1 A flowchart illustrating a capacity cost compensation method for multiple power supply types provided in an embodiment of the present invention; Figure 2 The following is a specific process for calculating the sufficient capacity of the generator set in an embodiment of the present invention. Detailed Implementation

[0032] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0033] It should be noted that, unless otherwise specified, the embodiments and features described in the present invention can be combined with each other.

[0034] The present invention will be further described below with reference to specific embodiments, but these are not intended to limit the scope of the invention.

[0035] like Figure 1 As shown in the figure, this invention discloses a capacity cost compensation method for multiple types of power supplies, including the following steps: Step 1: Collect various parameters of the generator set to form the input dataset for capacity compensation calculation; Before implementing this method, it is necessary to first collect the economic and technical parameters of the generator sets to form the input dataset for capacity compensation calculation. Specifically, the economic parameters of the generator sets should include installed capacity, capacity cost, and planned investment payback period, while the technical parameters should include availability rate, plant power consumption rate, maintenance time percentage, and forced outage rate. For hydropower units, parameters such as water flow and power generation efficiency should also be included. These parameters serve as input data for subsequent steps.

[0036] Step 2: Calculate the cost of various power supply capacities based on the generator set data in Step 1. Based on the fixed costs, investment recovery requirements, and system capacity gaps of various generator sets obtained in Step 1, the capacity costs of various power sources are calculated. In this embodiment, a unified capacity price benchmark is calculated by balancing the marginal capacity value of different power sources, serving as the basis for compensation.

[0037] Specifically, a cost-plus pricing method based on long-term marginal capacity cost is adopted, whereby the investment cost of marginal units is discounted into equivalent annuities using the actual discount rate, resulting in the following formula for calculating the capacity price: (1) In the formula: p c Capacity-based electricity price (ten thousand yuan) MW -1 ); T Investment payback period (in years); α For return on investment; β This is the actual discount rate; K c Investment cost per unit capacity of marginal generator sets (ten thousand yuan) MW -1 Under typical parameter settings, the discount rate α Take 10%, return on investment β Take 15%.

[0038] Therefore, the capacity electricity price of different generator sets can be calculated based on formula (1) and the data from step 1.

[0039] Step 3: Evaluate the initial capacity of each generator set based on its condition. Then, combine the constraints formed by the data in Step 1 to correct the initial capacity and obtain the surplus capacity. Finally, calculate the compensation capacity based on the demand balance principle. To ensure that the capacity compensation mechanism accurately reflects the actual contribution of different power sources under peak system load, this embodiment further verifies the compensation capacity after the capacity price is determined. This process includes three steps: initial capacity assessment, surplus capacity calculation, and compensation capacity determination.

[0040] First, the initial capacity of the generator set is assessed. This assessment is based on the rated installed capacity of the unit, and adjusted according to its operating characteristics and primary energy conditions. Because different types of power sources differ in terms of output stability, fuel security, and resource dependence, the initial capacity calculation models for various types of generator sets also differ, as detailed below: (1) Thermal power units Using historical data statistics, and considering factors such as fuel price fluctuation cycles and contract periods, the fuel utilization of thermal power units over several years is converted into availability rate, and the initial capacity is determined accordingly. A common calculation method is to select the fuel supply situation over the past five years and take the minimum annual average available capacity as the initial capacity of the unit. The calculation formula can be expressed as: (2) (3) (4) In the formula: Q 0,h The initial capacity (MW) of the thermal power unit; d h The main fuel availability rate of thermal power units within the calculation period; Q a,hThe maximum power (MW) of a thermal power unit operating on its primary fuel; Q b,h The maximum power (MW) of a thermal power unit operating on alternative fuels; L h,s,t Due to insufficient fuel supply, thermal power units are experiencing periodicity issues. s Inner t Maximum output limit per hour (MW); U h,s,t For the unit in the cycle s No. t The hourly state variable (takes 1 when the unit is limited by insufficient fuel, otherwise it is 0); T s For period s Total duration (hours).

[0041] (2) Hydropower units Hydropower units generate electricity using the potential and kinetic energy of water. They are highly efficient and flexible in operation, but their output is affected by multiple factors, including inflow conditions, ecological constraints, and reservoir capacity limitations. Therefore, when calculating the initial capacity of a hydropower unit, both the non-adjustable and adjustable output components must be considered. To reflect the usable capacity under different hydrological conditions, historical hydrological data is typically used for statistical analysis, combined with the output differences between wet and dry years, to assess the unit's usable capacity. The initial capacity of a hydropower unit generally consists of three parts: the unit's maximum operating power, the non-adjustable component, and the adjustable component. The calculation formula can be expressed as: (5) In the formula: H 0,k The initial capacity (MW) of the hydropower unit; H a,k This refers to the unit's maximum operating power (MW). H b,k The output is non-adjustable (MW), which mainly reflects the constraints of hydropower stations without adjustment capabilities; H c,k The adjustable power output (MW) reflects the reservoir's regulation capacity.

[0042] Non-adjustable output H b,k It can be further calculated using the following formula: (6) In the formula: Q m,k The average annual available flow rate during the dry season (m³ / s); or k The power generation efficiency of the hydroelectric generator unit is expressed as MW / (m³ / s).

[0043] Adjustable output H c,k It can be further calculated using the following formula: (7) (8) In the formula: D max The system's annual maximum load (MW); D 0 represents the lower limit of the system load (MW) under fully regulated hydropower support; E u,k For hydroelectric generator units k The regulating energy (MWh); E max,k This represents the upper limit of the annual power generation capacity of the unit at maximum power (MWh). Q j The upstream inflow rate is (m³ / s). E s,k The initial energy of the reservoir (MWh); W a,k The average annual available inflow (m³ / s).

[0044] (3) Nuclear power units Nuclear power units generate heat through the fission of nuclear fuel in a reactor, which then drives a steam turbine to produce electricity via a steam cycle. The initial capacity calculation method is similar to that of thermal power units. However, because nuclear power units require periodic core refueling and are primarily constrained by fuel availability, fuel security levels must be a key consideration in the assessment. Based on historical operating data, the minimum of the average annual available capacity over the five years preceding the calculation year is typically selected as the initial capacity of the unit. The calculation formula is as follows: (9) (10) (11) In the formula: Q 0,n For nuclear power units n Initial capacity (MW); Q m,n This is the maximum capacity (MW) of the unit under full-power operation conditions. d n Fuel availability of the unit; i n,y For the first y Annual fuel availability indicators; L n,y,t In the first y The year's first tHourly output limit due to fuel constraints (MW); U n,y,t The value is 1 if fuel is insufficient, and 0 otherwise. T y This represents the total duration (in hours) in year y.

[0045] (4) New energy units The peak load factor method is used to estimate the initial capacity of wind and solar power units. This involves comparing the average output of renewable energy units during the system's peak load period with their historical annual average output, and taking the minimum of the two as the initial capacity. The calculation formula is as follows: (12) In the formula: Q 0,x For new energy generator sets x Initial capacity (MW); Q a,x This represents the minimum average annual power output (MW) of the wind farm / photovoltaic power station over the past 5 years. Q p,x This represents the minimum average output (MW) of each typical load curve in the system during the peak load period, corresponding to the wind farm / photovoltaic power station.

[0046] Then, based on the initial capacity determination, factors such as planned maintenance, forced outages, and load constraints are comprehensively considered to calculate the unit's surplus capacity. Surplus capacity reflects the actual available capacity of the unit under a given reliability level and is an important reference for capacity compensation and electricity market operation. A unified calculation model can be used for the surplus capacity assessment of various types of generating units, and the specific calculation method is as follows: Based on the initial capacity, and considering the power consumption of the generator units and the annual planned maintenance, the initial capacity is adjusted to obtain the following preliminary surplus capacity: (13) In the formula: Q c,i For the unit j Initial ample capacity (MW); Q 0,j For the unit j Initial capacity (MW); 1,j This is a reduction factor related to the unit's electrical ratio; 2,j This is a reduction factor related to the unit's annual maintenance plan.

[0047] To further evaluate the availability of the units under forced outage conditions, the Monte Carlo method was used to simulate the random outage process of the units in the system to correct the initial capacity margin. The specific process is as follows: Figure 2As shown: (1) Set the number of sampling times t =l, randomly generated within the interval [0,1]. M Let be a random number, denoted as . x j,t ( j =1,2,..., M ), M This represents the total number of generator sets in the system. (2) Obtain the generator set j During the period t state variables Z j,t , can be represented as: (14) In the formula: 1 represents normal, and 0 represents fault; j For the unit j Forced shutdown rate.

[0048] (3) Determine the current sampling time t Is it equal to T If they are equal, the sampling ends and proceed to step (4); if they are not equal, then let t = t +1, and return to step (2) to continue execution; (4) Calculate the generator set based on the available capacity at each time. j The ample capacity is: (15) In the formula: Q sc，j For the unit j Ample capacity under Monte Carlo simulation; T To determine the number of time periods within the evaluation period.

[0049] Finally, the compensation capacity is calculated. Based on the demand balancing principle, to ensure reliable power supply under peak load conditions, the capacity compensation mechanism should be calculated based on the generator set's surplus capacity to obtain the compensation capacity. The specific calculation method is as follows: (16) In the formula, This indicates the system's peak load.

[0050] Step 4: Calculate the capacity compensation amount for each type of power supply based on the supplementary capacity and the capacity cost obtained in Step 2; In this step, the capacity compensation amount for each power source is calculated according to the principle of "compensation capacity × capacity electricity price".

[0051] Specifically, generator setsj The monthly income under the capacity compensation mechanism is: (17) In the formula: R j For the unit j The capacity compensation income (ten thousand yuan). P c The electricity price is based on capacity (ten thousand yuan / MW). Q b,j For the unit j The compensation capacity (MW).

[0052] Based on the above concept, this invention discloses a capacity cost compensation method and system for multiple power source types, used to reasonably compensate for the capacity contributions of various power sources such as coal-fired power, gas-fired power, hydropower, wind power, photovoltaic power, and energy storage. This method can effectively ensure system reliability, promote the coordinated development of conventional power sources, new energy sources, and energy storage, and improve the scientific and fair nature of the capacity compensation mechanism, thereby supporting the long-term stable operation of the electricity market and the security of power supply.

[0053] This invention also provides a system for implementing the above-described capacity cost compensation method for multiple power supply types, comprising: The data acquisition module is used to collect various parameters of the generator set and form the input dataset for capacity compensation calculation; The power supply capacity cost calculation module is used to calculate the cost of various power supply capacities based on the data collected by the data acquisition module. The compensation capacity calculation module is used to evaluate the initial capacity of various generator sets based on their conditions. Then, combined with the constraints formed by the data, the initial capacity is corrected to obtain the surplus capacity. Finally, based on the demand balance principle, the surplus capacity is converted to obtain the compensation capacity. The capacity compensation amount calculation module is used to calculate the capacity compensation amount for various types of power supplies based on the capacity cost obtained from the supplementary capacity and power supply capacity cost calculation modules.

[0054] The above are merely preferred embodiments of the present invention and are not intended to limit the implementation methods and protection scope of the present invention. Those skilled in the art should recognize that any equivalent substitutions and obvious changes made based on the content of this specification should be included within the protection scope of the present invention.

Claims

1. A capacity cost compensation method for multi-type power sources, characterized by, The method comprises the following steps: Step 1, collecting various parameters of the generator set to form an input data set for capacity compensation calculation; Step 2, calculating the capacity cost of various power sources according to the generator set data in the data set in step 1; Step 3: According to the condition of each generator set, the initial capacity is evaluated, then combined with the constraint conditions formed by the data set in step 1, the initial capacity is modified to obtain the adequate capacity, and then the adequate capacity is converted according to the demand balance principle to obtain the compensation capacity; Step 4: Calculate the capacity compensation amount of each type of power source according to the compensation capacity and the capacity cost obtained in step 2.

2. The capacity cost compensation method for multi-type power sources according to claim 1, characterized by, In step 1, the collected generator set parameters include economic parameters and technical parameters, wherein the economic parameters include installed capacity, capacity cost and planned investment recovery period, and the technical parameters include availability, auxiliary power rate, maintenance time ratio and forced outage.

3. The capacity cost compensation method for multi-type power sources according to claim 1, characterized by, The calculation method of capacity price in step 2 is: The cost addition pricing method based on long-term marginal capacity cost is adopted, and the investment cost of marginal unit is converted into equivalent annual payment according to the actual discount rate, so as to obtain the capacity price: where: p c Cp is the capacity price; T Cp is the capacity price; α Cp is the capacity price; β Cp is the capacity price; K c Cp is the capacity price.

4. The multi-type power source-oriented capacity cost compensation method according to claim 1, characterized by, In step 3, the initial capacity of each type of generator set is calculated based on the rated installed capacity of the generator set, wherein the types of generator sets include thermal power generator set, hydroelectric generator set, nuclear power generator set and new energy generator set.

5. The capacity cost compensation method for multi-type power sources according to claim 4, characterized by, The preliminary capacity calculation method of thermal power generator set is: Select the fuel supply situation in the past m years, take the minimum value of the annual average available capacity as the initial capacity of the unit, and the calculation formula is: wherein: Q 0,h is the initial capacity of the thermal power unit; The preliminary capacity calculation method of hydroelectric generator set is: h is the primary fuel availability of the thermal power unit for the calculation period; Q a,h is the maximum power of the thermal power unit operating on the primary fuel; Q b,h is the maximum power of the thermal power unit operating on the alternative fuel; L h,s,t is the maximum power limit of the thermal power unit at the s hour of the calculation period due to insufficient fuel supply; and t hour of the calculation period due to insufficient fuel supply. U h,s,t for the crew in the cycle s The t hour state variable; T s for the cycle s total duration.

6. The capacity cost compensation method for multi-type power sources according to claim 4, wherein, The historical hydrological data is used for statistics, and the output difference between the wet year and the dry year is combined to evaluate the available capacity of the unit, and the calculation formula is: The preliminary capacity calculation method of nuclear power generator set is: In the formula: H 0,k is the initial capacity of the hydroelectric unit; H a,k is the maximum operating power of the unit; H b,k is the unregulated output, mainly reflecting the constraint of the unregulated hydroelectric station; H c,k is the regulated output, embodying the reservoir regulation capacity; non-regulated output H b,k further calculated by the formula: In the formula: Q m,k is the multi-year average available flow in the dry season; The preliminary capacity calculation method of new energy generator set is: k is the power generation efficiency of the hydroelectric generating set; Adjustable output H c,k Further calculated by the following formula: wherein: D max is the annual maximum load of the system; D 0 is the lower bound of the load of the system under full regulation of the hydroelectric support; E u,k is the regulation energy of the hydroelectric unit k ; E max,k is the upper bound of the annual energy production of the unit at maximum power; Q j is the upstream inflow flow rate; E s,k is the initial energy of the reservoir; W a,k is the average annual available storage inflow.

7. The capacity cost compensation method for multi-type power sources according to claim 4, wherein, The peak load rate method is used to estimate the initial capacity of wind power and photovoltaic generator set, by comparing the average output of new energy generator set during the peak load period with its historical annual average output, taking the minimum value of the two as the initial capacity, and the calculation formula is: According to historical operation data, the fuel availability of the previous year is selected before the calculation year m The minimum value of the annual average available capacity is taken as the initial capacity of the unit, and the calculation formula is as follows: In the formula: Q 0,n is the initial capacity of the nuclear power unit; n Q m,n is the maximum capacity of the unit under full power operating conditions; The calculation method of adequate capacity is: n is the fuel availability of the unit; On the basis of the initial capacity, combined with the auxiliary power of the generator set and the annual planned maintenance in step 1, the initial capacity is adjusted to obtain the preliminary adequate capacity: n,y is the fuel availability index in the first y year; L n,y,t is the output upper limit caused by fuel constraints at the first y hour in the first t year;​ U n,y,t 1 if fuel is insufficient, otherwise 0; T y Total duration of year y.

8. The capacity cost compensation method for multi-type power sources according to claim 4, wherein, The Monte Carlo method is used to simulate the random outage process of the generator set to modify the preliminary adequate capacity to obtain the adequate capacity, and the method is: It comprises: In the formula: Q 0,x The initial capacity of the new energy generator set x ; Q a,x The minimum value of the average output of the wind farm / photovoltaic power station in each year m ​ Q p,x The minimum value of the average output of the wind farm / photovoltaic power station corresponding to the typical load curve of each system in the peak load period.

9. The capacity cost compensation method for multi-type power sources according to claim 2, wherein, A data collection module is used to collect various parameters of the generator set to form an input data set for capacity compensation calculation; A power capacity cost calculation module is used to calculate the capacity cost of various power sources according to the generator set data in the data set obtained by the data collection module; In the formula: Q c,i To the unit j The initial spare capacity; Q 0,j is the initial capacity of the unit; j 1,j is a reduction factor related to the unit's electrical ratio; 2,j is a reduction factor related to the unit's annual maintenance schedule;​ A compensation capacity calculation module is used to evaluate the initial capacity of each type of generator set according to the condition of each type of generator set, and then modify the initial capacity according to the constraint conditions formed by the data set to obtain the adequate capacity, and then convert the adequate capacity to obtain the compensation capacity according to the demand balance principle; (1) Set the number of sampling time t = 1, randomly generate a random number in the interval [0, 1], denoted as M x j,t wherein, j = 1, 2,..., M , M is the total number of generating units in the system;​ (2) Obtaining a generator set j At a time period t of a state variable Z j,t is expressed as: wherein: 1 indicates normal, 0 indicates failure; j For the unit j forced outage rate; (3) Determine the current sampling time t Is it equal to T ; If equal, the sampling is ended and step (4) is entered; if not reached, let t = t +1, and return to step (2) for execution. (4) Calculate the generator set based on the available capacity at each time. j The ample capacity is: In the formula: Q sc，j For the machine set j The adequacy capacity under the Monte Carlo simulation; T For the number of time periods within the evaluation period.

10. A system for implementing the capacity cost compensation method for multi-type power sources according to any one of claims 1 to 9, characterized by, ​ ​ ​ ​ The capacity compensation amount calculation module is configured to calculate the capacity compensation amount of each type of power supply according to the capacity cost obtained by the supplementary capacity and power supply capacity cost calculation module.

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