Large-scale access scene power balancing method based on new energy capacity value

Abstract

The invention discloses a large-scale access scene electric power balance method based on new energy capacity value, which provides reference for planners to evaluate system installation adequacy level and operation scheduling and promotes healthy and coordinated development of a power grid and a power supply. The method comprises the following steps: step (1), carrying out annual analysis, arranging hydropower and thermal power maintenance plans, and determining a day with minimum system adequacy as an electric power balance control day; (2) judging whether the electric quantity of the energy storage power supply meets the balance participation requirement or not according to the operation result of the energy storage power supply; and step (3), constructing a power balance scene: constructing a new energy power balance scene, selecting new energy reserve capacity, and performing power balance scene production and operation simulation by taking the minimum power gap as an objective function, wherein the power balance scene construction is divided into new energy power balance scene construction, new energy reserve capacity selection and power balance scene production and operation simulation. And step (4), according to a production operation simulation result, determining power supply output in a peak period, and compiling an electric power balance table.

Description

Technical Field

[0001] The present invention relates to a power balancing method, and in particular to a power balancing method that takes into account the capacity value of new energy in a scenario of large-scale access of new energy. Background Art

[0002] Traditional power sources have capacity value. Due to their randomness, volatility and intermittency, the capacity value of wind power and photovoltaic power, that is, their contribution to power generation reliability, is relatively small. Wind power and photovoltaic power participate in power balance, that is, they are regarded as power sources with only energy value but no capacity value. However, as the scale of intermittent power sources increases, if their capacity value is still ignored, it will cause large errors in the analysis and evaluation of the system planning and operation stages, especially the economic evaluation. Therefore, in recent years, planning departments have begun to pay attention to the methods of intermittent power sources such as wind power generation and photovoltaic power generation to participate in power and electricity balance.

[0003] The existing balancing method has gone through the following three stages:

[0004] (1) The scale of new energy is relatively small, so the power balance is not taken into consideration. The electricity balance is considered according to the traditional balance method, and new energy is included in the electricity balance according to the annual utilization hours.

[0005] (2) When the scale of new energy is large, the probability of new energy output during peak hours is counted to determine the reliable capacity of new energy, and this capacity is used to participate in power balance. The peak load of Qinghai power grid is at night, when the photovoltaic output is 0, and wind power participates in power balance with reliable capacity. At present, most power balances adopt this method.

[0006] The first method ignores the capacity value of intermittent power sources, which will lead to serious waste of resources. The low economic value also hinders the large-scale development of wind power and photovoltaic power generation. The second method counts the output characteristics of new energy during peak hours, which reflects the capacity value of intermittent power sources to a certain extent, but does not consider the electricity transfer function of hydropower and energy storage. New energy has also begun to gradually shift from supplementary energy to alternative energy. However, since new energy such as wind power and photovoltaic power generation has output characteristics different from conventional hydropower and thermal power, its power generation output depends on uncontrollable factors such as external wind and light, and the output has greater randomness and volatility. The high proportion of new energy has brought great challenges to planning and operation personnel in evaluating the system's installed capacity and operation scheduling. Summary of the invention

[0007] The technical problem to be solved by the present invention is to provide a power balancing method for large-scale access scenarios based on the value of new energy capacity in response to the deficiencies in the above-mentioned prior art, so as to provide a reference for planners to evaluate the system installed capacity surplus level and operation scheduling, and promote the healthy and coordinated development of the power grid and power supply.

[0008] In order to achieve the above object, the present invention adopts the following technical solutions:

[0009] The power balancing method for large-scale access scenarios based on the value of new energy capacity includes the following steps:

[0010] Step (1): Conduct an annual analysis, arrange maintenance plans for hydropower and thermal power, and determine the day with the minimum system margin as the power balance control day;

[0011] Step (2): Based on the operation results of the energy storage power source, determine whether its electricity meets the requirements for participating in the balance; when the energy storage scale or hydropower regulation capacity is strong, the electricity of new energy during non-peak hours can be moved to peak hours through energy storage to generate electricity, and then a power balance scenario is constructed.

[0012] Step (3): Constructing a power balance scenario: The power balance scenario construction is divided into the construction of a new energy power balance scenario, the selection of new energy backup capacity, and the simulation of the production and operation of the power balance scenario with the minimum power gap as the objective function.

[0013] Step (4): Based on the production operation simulation results, determine the power output during peak hours and prepare a power balance sheet.

[0014] As a preferred embodiment of the balancing method disclosed in the present invention,

[0015] In step (3), the new energy power balance scenario is constructed as follows:

[0016] The power balance scenario is 24 hours a day on the power balance control day, and the power balance is the balance at the moment of maximum load in this scenario;

[0017] The construction of new energy power balance scenario is divided into new energy guarantee rate selection, typical daily curve selection, daily power conversion and peak time output correction, which is specifically carried out in the following steps:

[0018] S301: Select the new energy guarantee rate, and based on the new energy power generation characteristics and the installed capacity of wind power and photovoltaic power in the planned year, consider the coupling of wind and photovoltaic power output, and calculate the wind and photovoltaic superposition output in the planned year;

[0019] S302: A method for selecting a typical day output curve is to select the full-day output data with a 100% guarantee rate as a typical day curve;

[0020] S303: Based on the planned annual wind and solar power combined output, under the selected new energy guarantee rate, calculate the daily power and load peak time output of the new energy corresponding to the guarantee rate;

[0021] S304: Correct the peak hour output on the typical daily output curve, and convert it to other times except the peak hour in proportion to the daily electricity quantity difference, so as to obtain a new energy power balance scenario under the guarantee rate.

[0022] As a preferred embodiment of the balancing method disclosed in the present invention,

[0023] In step (3), the selection process of the new energy reserve capacity is as follows:

[0024] On the basis of meeting the system's minimum reserve, increase the reserve capacity provided to the part of the new energy output that is damaged; among them, the minimum reserve is the reserve capacity required by the system to meet the minimum power generation scenario of new energy in extreme weather when the new energy guarantee rate is 100%;

[0025] The new energy reserve capacity is the reserve capacity that the system needs to increase to cope with the uncertainty of new energy output when other guarantee rates are selected for new energy.

[0026] The power output of renewable energy that is destroyed is the power output of renewable energy that exceeds the design guarantee rate of renewable energy;

[0027] The calculation method of new energy backup capacity is: first determine the difference between the power destroyed by new energy and the output of new energy during the peak period of 100% guaranteed daily power, and then calculate the backup capacity that the system needs to provide for this part of the power destroyed by new energy.

[0028] As a preferred embodiment of the balancing method disclosed in the present invention,

[0029] In the step (1), the power balance control day is the maximum load day in winter.

[0030] As a preferred embodiment of the balancing method disclosed in the present invention,

[0031] The step S301 also includes the step of calculating the annual maximum power generation hour (T), the daily power under different conditions (E) and the output under different conditions (P);

[0032] The step S302 further includes the step of integrating the typical daily force (P) to fit a typical daily force curve;

[0033] In step S303, by calculating the daily power consumption-accumulated frequency (f e ) and daily power consumption - cumulative power consumption (Q E ) calculation, which paves the way for correcting the peak output on the typical daily output curve in the next step.

[0034] In step S304, the hourly output minus the cumulative frequency (f P ) and hourly output - accumulated electricity (Qp ) is calculated to correct the peak output on the typical daily output curve, and then converted to other times except the peak output in proportion to the daily electricity difference, so as to obtain the new energy power balance scenario under the guarantee rate.

[0035] As a preferred implementation of the balancing method disclosed in the present invention, in the annual maximum power generation hour (T), the annual maximum power generation hour is the ratio of the annual power generation of new energy to the installed capacity of new energy, which is used to reflect the overall power generation level of new energy;

[0036]

[0037] In formula (1), T is the annual maximum power generation hours; Q y Annual electricity generation from renewable energy; C is installed capacity from renewable energy.

[0038] Daily electricity (E) is the ratio of daily electricity generation of renewable energy to installed capacity of renewable energy;

[0039]

[0040] In formula (2), E is the daily electricity; Q d is the daily power generation of renewable energy; C is the installed capacity of renewable energy.

[0041] Maximum daily power consumption (E 最大 ) is the maximum daily power of the year, and the minimum daily power (E 最小 ) is the minimum daily electricity consumption throughout the year, and the daily average electricity consumption (E 平均 ) is the total annual electricity consumption divided by the number of days in a year;

[0042] Daily effective power (E 有效 ) is the daily power corresponding to a certain cumulative power on the daily power-cumulative power curve. Usually, the daily power value at 95% cumulative power is selected, which means that the daily power of new energy does not exceed E 有效 The cumulative charge reaches 95%;

[0043] Daily guaranteed power (E 保证 ) is the daily electricity quantity corresponding to a certain cumulative frequency on the daily electricity quantity-cumulative frequency curve. The electricity quantity value at 95% cumulative frequency is usually selected, which means that the daily electricity quantity of new energy is not less than this value on 95% of the days, that is, the confidence level is 95% of the daily electricity generation of new energy;

[0044] Maximum output (P 最大 ) is the maximum hourly output throughout the year, and the minimum output (P 最小 ) is the minimum hourly output throughout the year, and the average output (P 平均 ) is the total annual electricity consumption divided by the number of hours in a year;

[0045] Effective capacity (P有效 ), the output corresponding to a certain cumulative power on the hourly output-cumulative power curve is usually selected at 95% cumulative power, which means that the output of new energy does not exceed P 有效 The cumulative charge reaches 95%;

[0046] Guaranteed output (P 保证 ), the output corresponding to a certain cumulative frequency on the hourly output-cumulative frequency curve, usually the output value at 95% cumulative frequency is selected, which means that the output of new energy is not less than this value at 95% of the time, that is, the confidence level is 95% of the new energy power generation output;

[0047] In the monthly power distribution curve, the monthly power distribution is used to reflect the monthly power changes, namely:

[0048]

[0049] In formula (3), T m Q is the monthly electricity consumption of new energy; m Actual monthly electricity generation of renewable energy; C is installed capacity of renewable energy;

[0050] Daily power-accumulated frequency (f e ) is the ratio of the number of days in a year with a generating hour greater than or equal to a certain day to the number of days in a year;

[0051]

[0052] In formula (4), f e D is the daily power consumption-accumulated frequency pr E is the daily electricity (d) In E (d)≥ E (1) The interval is the number of days in a year, and D is the number of days in a year;

[0053] Daily power - cumulative power (Q E ) is the ratio of the total number of hours of electricity generated on a certain day to the annual electricity generation;

[0054]

[0055] Q E =Q E1 +Q E2 (6)

[0056] Hourly output - cumulative frequency (f P ) is the ratio of the number of times that the output of a new energy source is greater than or equal to a certain output in a year to the number of hours in a year, indicating the output that the new energy source can achieve at this frequency;

[0057]

[0058] In formula (6), N PR Contribute to new energy (t) In P (t) ≥P (1) The number of times the interval occurs throughout the year, H is the number of hours in the year;

[0059] Hourly output - accumulated electricity (Q p ) is the ratio of the total renewable energy output less than or equal to a certain output to the annual electricity output, indicating the cumulative electricity proportion of renewable energy output not exceeding a certain output;

[0060]

[0061] Q p =Q P1 +Q P2 (8)

[0062] The beneficial effects of the present invention are:

[0063] In the context of accelerating the construction of a new power system under the background of "dual carbon", the method of the present invention calculates the value of new energy capacity in the new power system, that is, its contribution to power generation reliability, establishes a calculation method for the participation of new energy in power balance, and provides a reference for planners to evaluate the system's installed capacity surplus level and operation scheduling, thereby promoting the healthy and coordinated development of the power grid and power sources.

[0064] The method of the present invention considers building a more systematic power balance calculation method in the scenario of large-scale access of new energy. By determining the power balance control day, the power balance scenario is constructed in combination with the operation results of the energy storage power supply, and finally the power balance table is compiled according to the production operation simulation results. The power balance analysis of the new energy access scenario under complex circumstances is carried out with a clear and systematic calculation process.

[0065] In the process of constructing a new energy supply guarantee scenario, the method of the present invention selects the guarantee rate of new energy power and output in combination with the new energy power generation characteristics, and jointly supports the scenario construction with a variety of calculation parameters and output curves, which has parameter support and a wider range of applications. BRIEF DESCRIPTION OF THE DRAWINGS

[0066] Figure 1 Flow chart for the participation of new energy in electricity balance;

[0067] Figure 2 Build a flow chart for renewable energy power balancing scenarios;

[0068] Figure 3 This is the calculation process for the reserve capacity of new energy. DETAILED DESCRIPTION

[0069] The specific implementation of the present invention is described below in conjunction with the accompanying drawings and embodiments:

[0070] Example 1: The specific implementation process of the present invention is as follows

[0071] (1) Conduct an annual analysis, arrange maintenance plans for hydropower and thermal power, and determine the day with the minimum system surplus as the power balance control day. For the Qinghai power grid, the power balance control day is the day with the maximum load in winter.

[0072] (2) Based on the operation results of the energy storage power source, determine whether its power meets the requirements for participating in the balance. When the energy storage scale or hydropower regulation capacity is strong, the power of new energy during non-peak hours can also be moved to peak hours through energy storage, which requires the construction of a power balance scenario.

[0073] (3) The construction of power balance scenarios is divided into the construction of new energy power balance scenarios, the selection of new energy backup capacity, and the simulation of power balance scenario production and operation with the minimum power gap as the objective function.

[0074] (4) According to the simulation results of production operation, determine the power output during peak hours and prepare the power balance sheet. Figure 1 .

[0075] In the construction of the new energy power balance scenario in the above embodiment:

[0076] The power balance scenario is 24 hours a day on a power balance control day, and the power balance is the balance at the moment of maximum load in this scenario.

[0077] The construction of new energy power balance scenario can be divided into new energy guarantee rate selection, typical daily curve selection, daily power conversion and peak time output correction, specifically in the following steps:

[0078] First, the new energy guarantee rate is selected, and based on the characteristics of new energy power generation and the installed capacity of wind power and photovoltaic power in the planned year, the coupling of wind and solar power output is considered to calculate the wind and solar superimposed output in the planned year.

[0079] Then, the method for selecting the typical day output curve is to select the full-day output data with a 100% guarantee rate as the typical day curve.

[0080] Secondly, based on the planned annual wind and solar power combined output, under the selected new energy guarantee rate, the daily electricity consumption and peak load output of the new energy corresponding to the guarantee rate are calculated.

[0081] Finally, the peak power output is corrected on the typical daily power curve, and the power output is converted to other times except the peak power in proportion to the daily power difference, so as to obtain the new energy power balance scenario under the guarantee rate. Figure 2 .

[0082] In the above specific embodiment of the present invention, the spare capacity is calculated as follows:

[0083] On the basis of meeting the system's minimum reserve capacity, it is necessary to increase the reserve capacity provided to the damaged part of the new energy output. Among them, the minimum reserve capacity is the reserve capacity required by the system to meet the minimum power generation scenario of new energy in extreme weather when the new energy guarantee rate is selected as 100%. The new energy reserve capacity is the reserve capacity required by the system to cope with the uncertainty of new energy output when other guarantee rates are selected for new energy. The new energy damage output / power is the new energy output / power that exceeds the new energy design guarantee rate (100% guarantee rate).

[0084] The calculation method of new energy reserve capacity is: first determine the difference between the destroyed power / electricity of new energy (daily power / peak output in the new energy supply guarantee scenario) and the daily power / peak output of new energy with 100% guarantee rate, and then calculate the reserve capacity that the system needs to provide for this part of the destroyed power / electricity of new energy. See the calculation process of new energy reserve capacity for details. Figure 3 .

[0085] The calculation process of some specific parameters in the above embodiment is as follows:

[0086] (1) Annual maximum power generation hours (T)

[0087] The annual maximum generating hours is the ratio of the annual power generation of new energy to the installed capacity of new energy, which is used to reflect the overall power generation level of new energy.

[0088]

[0089] Where, T is the annual maximum power generation hours; Q y Annual electricity generation from renewable energy; C is installed capacity from renewable energy.

[0090] Due to the influence of weather, the number of hours of power generation from renewable energy varies each year. We should select typical year data through multi-year data analysis.

[0091] (2) Maximum daily power consumption (E 最大 ), daily effective power (E 有效 ), daily average power consumption (E 平均 ), daily guaranteed power (E 保证 )、Daily minimum power consumption (E 最小 ) Daily electricity (E) is the ratio of daily power generation of new energy to the installed capacity of new energy.

[0092]

[0093] Where, E is the daily electricity; Q is the daily electricity; d is the daily power generation of renewable energy; C is the installed capacity of renewable energy.

[0094] Maximum daily power consumption (E 最大) is the maximum daily power of the year, and the minimum daily power (E 最小 ) is the minimum daily electricity consumption throughout the year, and the daily average electricity consumption (E 平均 ) is the total annual electricity consumption divided by the number of days in a year.

[0095] Daily effective power (E 有效 ) is the daily power corresponding to a certain cumulative power on the daily power-cumulative power curve. Usually, the daily power value at 95% cumulative power is selected, which means that the daily power of new energy does not exceed E 有效 The cumulative electricity consumption reaches 95%. It is mainly used for the selection of transmission capacity of new energy transmission projects and the calculation of peak load balance of power grid acceptance of new energy.

[0096] Daily guaranteed power (E 保证 ) is the daily electricity quantity corresponding to a certain cumulative frequency on the daily electricity quantity-cumulative frequency curve. The electricity quantity value at 95% cumulative frequency is usually selected, which means that the daily electricity quantity of new energy is not less than this value on 95% of the days, that is, the daily power generation of new energy with a confidence level of 95%. It is used to measure the value of electricity quantity of new energy under the condition of guaranteed power supply, and generally refers to the electricity quantity that can replace conventional power supply under the condition of unchanged reliability.

[0097] The daily electricity characteristic indicators are arranged from large to small as follows: Daily maximum electricity (E 最大 ), daily effective power (E 有效 ), daily average power consumption (E 平均 ), daily guaranteed power (E 保证 )、Daily minimum power consumption (E 最小 ).

[0098] Maximum output (P 最大 )、Effective Capacity(P 有效 ), average output (P 平均 )、Guaranteed output (P 保证 )、Minimum output (P 最小 )

[0099] Maximum output (P 最大 ) is the maximum hourly output throughout the year, and the minimum output (P 最小 ) is the minimum hourly output throughout the year, and the average output (P 平均 ) is the total annual electricity consumption divided by the number of hours in the year.

[0100] Effective capacity (P 有效 ), the output corresponding to a certain cumulative power on the hourly output-cumulative power curve is usually selected at 95% cumulative power, which means that the output of new energy does not exceed P 有效 The cumulative charge reaches 95%.

[0101] Guaranteed output (P 保证), the output corresponding to a certain cumulative frequency on the hourly output-cumulative frequency curve usually selects the output value at 95% cumulative frequency, which means that the output of new energy is not less than this value 95% of the time, that is, the confidence level is 95% of the new energy power generation output.

[0102] (4) Monthly power distribution curve

[0103] Monthly power distribution is used to reflect the monthly power changes, namely:

[0104]

[0105] Where, T m Q is the monthly electricity consumption of new energy; m Actual monthly electricity generation from renewable energy; C is installed capacity of renewable energy.

[0106] (5) Daily power consumption-accumulated frequency (f e )

[0107] The daily electricity-cumulative frequency is the ratio of the number of days in a year when the electricity generation hours on a certain day occur or exceed that on a certain day to the number of days in a year.

[0108]

[0109] In the formula, f e D is the daily power consumption-accumulated frequency pr E is the daily electricity (d) In E (d)≥ E (1) The interval is the number of days in a year, and D is the number of days in a year.

[0110] (6) Daily power consumption - Cumulative power consumption (Q E )

[0111] Daily electricity consumption - Cumulative electricity consumption is the ratio of the total electricity generation hours on a certain day to the annual electricity consumption.

[0112]

[0113] (7) Hourly output - cumulative frequency (f P )

[0114] Hourly output-cumulative frequency is the ratio of the number of times that the output of new energy is greater than or equal to a certain output in a year to the number of hours in a year, indicating the output that new energy can achieve at this frequency.

[0115]

[0116] Where N PR Contribute to new energy (t) In P (t) ≥P (1)The number of times the interval occurs throughout the year, and H is the number of hours in the year.

[0117] (8) Hourly output - accumulated power (Q p )

[0118] Hourly output - cumulative electricity is the ratio of the sum of renewable energy output less than or equal to a certain output to the annual electricity, indicating the proportion of cumulative electricity when renewable energy output does not exceed a certain output.

[0119]

[0120] The preferred embodiments of the present invention are described in detail above in conjunction with the accompanying drawings, but the present invention is not limited to the above embodiments. Various changes can be made within the knowledge scope of ordinary technicians in the field without departing from the purpose of the present invention. These changes involve related technologies well known to those skilled in the art, which all fall within the scope of protection of the patent of the present invention.

[0121] Many other changes and modifications may be made without departing from the concept and scope of the present invention.It should be understood that the present invention is not limited to the specific embodiments, and the scope of the present invention is defined by the appended claims.

Claims

1. A large-scale access scenario power balancing method based on the value of new energy capacity, characterized in that: The following steps are included: Step (1): Conduct an annual analysis, arrange maintenance plans for hydropower and thermal power, and determine the day with the minimum system margin as the power balance control day; Step (2): Based on the operation results of the energy storage power source, determine whether its power reaches the balancing requirement; When the energy storage scale or hydropower regulation capacity is strong, the electricity generated by renewable energy during off-peak hours can be moved to peak hours through energy storage, thus creating a power balance scenario. Step (3): Constructing a power balance scenario: The power balance scenario construction is divided into the construction of a new energy power balance scenario, the selection of new energy backup capacity, and the simulation of the production and operation of the power balance scenario with the minimum power gap as the objective function; Step (4): Based on the production operation simulation results, determine the power output during peak hours and prepare a power balance sheet.

2. The method for balancing power in large-scale access scenarios based on new energy capacity value according to claim 1 is characterized in that: In step (3), the new energy power balance scenario is constructed as follows: The power balance scenario is 24 hours a day on the power balance control day, and the power balance is the balance at the moment of maximum load in this scenario; The construction of new energy power balance scenario is divided into new energy guarantee rate selection, typical daily curve selection, daily power conversion and peak time output correction, which is specifically carried out in the following steps: S301: Select the new energy guarantee rate, and based on the new energy power generation characteristics and the installed capacity of wind power and photovoltaic power in the planned year, consider the coupling of wind and solar power output, and calculate the wind and solar power superposition output in the planned year; S302: A method for selecting a typical day output curve is to select the full-day output data with a 100% guarantee rate as a typical day curve; S303: Based on the planned annual wind and solar power combined output, under the selected new energy guarantee rate, calculate the daily power and load peak time output of the new energy corresponding to the guarantee rate; S304: Correct the peak hour output on the typical daily output curve, and convert it to other times except the peak hour in proportion to the daily electricity quantity difference, so as to obtain a new energy power balance scenario under the guarantee rate.

3. The method for balancing power in large-scale access scenarios based on new energy capacity value according to claim 1 is characterized in that: In step (3), the selection process of the new energy reserve capacity is as follows: On the basis of meeting the system's minimum reserve, increase the reserve capacity provided to the part of the new energy output that is damaged; among them, the minimum reserve is the reserve capacity required by the system to meet the minimum power generation scenario of new energy in extreme weather when the new energy guarantee rate is 100%; The new energy reserve capacity is the reserve capacity that the system needs to increase in order to cope with the uncertainty of new energy output when other guarantee rates are selected for new energy. The power output of renewable energy that is destroyed is the power output of renewable energy that exceeds the design guarantee rate of renewable energy; The calculation method of new energy backup capacity is: first determine the difference between the power destroyed by new energy and the output of new energy during the peak period of 100% guaranteed daily power, and then calculate the backup capacity that the system needs to provide for this part of the power destroyed by new energy.

4. The method for balancing power in large-scale access scenarios based on new energy capacity value according to claim 1 is characterized in that: In the step (1), the power balance control day is the maximum load day in winter.

5. The method for balancing power in large-scale access scenarios based on new energy capacity value according to claim 2 is characterized in that: The step S301 also includes the step of calculating the annual maximum power generation hour (T), the daily power under different conditions (E) and the output under different conditions (P); The step S302 further includes the step of integrating the typical daily force (P) to fit a typical daily force curve; In step S303, by calculating the daily power consumption-accumulated frequency (f e ) and daily power consumption - cumulative power consumption (Q E ) calculation, which paves the way for correcting the peak output on the typical daily output curve in the next step; In step S304, the hourly output minus the cumulative frequency (f P ) and hourly output - accumulated electricity (Q p ) is calculated to correct the peak output on the typical daily output curve, and then converted to other times except the peak output in proportion to the daily electricity difference, so as to obtain the new energy power balance scenario under the guarantee rate.

6. The method for balancing power in large-scale access scenarios based on new energy capacity value according to claim 5 is characterized in that: The annual maximum power generation hours (T) is the ratio of the annual power generation of new energy to the installed capacity of new energy, which is used to reflect the overall power generation level of new energy; In formula (1), T is the annual maximum power generation hours; Q y Annual electricity generation from renewable energy; C is installed capacity from renewable energy. Daily electricity (E) is the ratio of daily electricity generation of renewable energy to installed capacity of renewable energy; In formula (2), E is the daily electricity; Q d is the daily power generation of renewable energy; C is the installed capacity of renewable energy. Maximum daily power consumption (E 最大 ) is the maximum daily power of the year, and the minimum daily power (E 最小 ) is the minimum daily electricity consumption throughout the year, and the daily average electricity consumption (E 平均 ) is the total annual electricity consumption divided by the number of days in a year; Daily effective power (E 有效 ) is the daily power corresponding to a certain cumulative power on the daily power-cumulative power curve. Usually, the daily power value at 95% cumulative power is selected, which means that the daily power of new energy does not exceed E 有效 The cumulative charge reaches 95%; Daily guaranteed power (E 保证 ) is the daily electricity quantity corresponding to a certain cumulative frequency on the daily electricity quantity-cumulative frequency curve. The electricity quantity value at 95% cumulative frequency is usually selected, which means that the daily electricity quantity of new energy is not less than this value on 95% of the days, that is, the confidence level is 95% of the daily electricity generation of new energy; Maximum output (P 最大 ) is the maximum hourly output throughout the year, and the minimum output (P 最小 ) is the minimum hourly output throughout the year, and the average output (P 平均 ) is the total annual electricity consumption divided by the number of hours in a year; Effective capacity (P 有效 ), the output corresponding to a certain cumulative power on the hourly output-cumulative power curve is usually selected at 95% cumulative power, which means that the output of new energy does not exceed P 有效 The cumulative charge reaches 95%; Guaranteed output (P 保证 ), the output corresponding to a certain cumulative frequency on the hourly output-cumulative frequency curve, usually the output value at 95% cumulative frequency is selected, which means that the output of new energy is not less than this value at 95% of the time, that is, the confidence level is 95% of the new energy power generation output; In the monthly power distribution curve, the monthly power distribution is used to reflect the monthly power changes, namely: In formula (3), T m Q is the monthly electricity consumption of new energy; m Actual monthly electricity generation of renewable energy; C is installed capacity of renewable energy; Daily power-accumulated frequency (f e ) is the ratio of the number of days in a year with a generating hour greater than or equal to a certain day to the number of days in a year; In formula (4), f e D is the daily power consumption-accumulated frequency pr E is the daily electricity (d) In E (d)≥ E (1) The interval is the number of days in a year, and D is the number of days in a year; Daily power - cumulative power (Q E ) is the ratio of the total number of hours of electricity generated on a certain day to the annual electricity generation; Q E =Q E1 +Q E2 (6) Hourly output - cumulative frequency (f P ) is the ratio of the number of times that the output of a new energy source is greater than or equal to a certain output in a year to the number of hours in a year, indicating the output that the new energy source can achieve at this frequency; In formula (6), N PR Contribute to new energy (t) In P (t) ≥P (1) The number of times the interval occurs throughout the year, H is the number of hours in the year; Hourly output - accumulated electricity (Q p ) is the ratio of the total renewable energy output less than or equal to a certain output to the annual electricity output, indicating the cumulative proportion of renewable energy output not exceeding a certain output; Q p =Q P1 +Q P2 (8)。

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