CN115600838A - Hydropower station regulating capacity evaluation method, equipment and medium - Google Patents
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Abstract
The invention discloses a hydropower station regulation capacity evaluation method, equipment and medium, wherein the hydropower station regulation capacity evaluation method comprises the steps of reflecting a reservoir regulation capacity static evaluation index of absolute regulation capacity and relative regulation capacity of a reservoir and a reservoir regulation capacity dynamic evaluation index of future regulation runoff capacity, reflecting a power supply regulation capacity dynamic evaluation index of peak regulation capacity and relative proportion of water storage capacity and power generation capacity of the reservoir in the current reservoir state, reflecting a proportion of wind and light resources which can be regulated by water and electricity, a ratio of actually consumed water and wind electricity to a theoretical value, using efficiency of a channel after hydropower regulation and a hydropower regulation benefit evaluation index of total output power close to power grid load capacity, evaluating the hydropower station regulation capacity of water, wind and light integration with large regulation capacity difference, strong uncertainty and multiple influence factors from multiple dimensions, and realizing evaluation rationality of regulation runoff capacity of a hydropower station and capacity meeting power grid load demand.
Description
Technical Field
The invention relates to the technical field of electric power, in particular to a hydropower station regulating capacity evaluation method, equipment and medium.
Background
New energy such as wind power, photovoltaic and the like in China develops rapidly, but the new energy power generation is influenced by meteorological factors and has obvious randomness, volatility and intermittency, and large-scale grid-connected operation is restricted. For a hydroenergy enrichment area, in order to promote grid-connected consumption of intermittent energy sources such as photovoltaic power generation and the like, hydropower stations which are flexible in starting and high in regulating speed are utilized to perform complementary regulation on photovoltaic power generation and wind power generation, cascade water and wind power complementary coordinated operation is realized, and the grid-connected consumption level of water and light clean energy resources is improved, so that the hydropower station becomes an important gripper for energy structure transformation and upgrading and novel power system construction in China. However, as the types and types of hydropower stations are various, radial-flow type hydropower stations, daily regulation hydropower stations, seasonal regulation hydropower stations, annual regulation hydropower stations, perennial regulation hydropower stations and the like are divided according to regulation capacity, the regulation capacity difference of the water-wind-light integrated system is large, the regulation capacity difference under different water conditions is also large, the number of involved hydropower stations is large, the uncertainty is strong, the influence factors are many and complex, and the requirement for establishing the hydropower station regulation capacity evaluation index system is high. Therefore, in order to realize optimal configuration of the cascade water-wind-light resources, multi-energy complementary coordinated scheduling operation, promote large-scale development and grid-connected consumption of new energy, boost the construction of a novel power system and realize a double-carbon target, a hydropower station regulation capacity evaluation index system of a hydropower enrichment area power grid needs to be researched urgently, and important technical support is provided for reasonable development and integrated operation of the water-wind-light resources.
Disclosure of Invention
The invention aims to solve the technical problems that the existing hydropower station evaluation method is single and cannot reasonably evaluate the regulation capacity of a water-wind-light integrated hydropower station with large regulation capacity difference, strong uncertainty, multiple influence factors and complexity, and aims to provide a hydropower station regulation capacity evaluation method, equipment and medium.
The invention is realized by the following technical scheme:
the invention provides a hydropower station regulating capacity evaluation method in a first aspect, which comprises the following specific steps:
acquiring reservoir capacity data of a target hydropower station, and determining a reservoir regulation capacity static evaluation index and a reservoir regulation capacity dynamic evaluation index;
acquiring load data of each unit in a target time period of a target hydropower station, and determining a dynamic evaluation index of the power supply regulation capacity of the hydropower station;
acquiring installed data of a target hydropower station, power generation data and power transmission data in a target time period, and determining hydropower regulation benefit evaluation indexes of the hydropower station;
and evaluating the regulating capacity of the hydropower station according to the reservoir regulating capacity static evaluation index, the reservoir regulating capacity dynamic evaluation index, the power supply regulating capacity dynamic evaluation index and the hydropower regulating benefit evaluation index.
The hydropower station regulation capacity evaluation method combines abundant hydropower station types in hydropower resource enrichment areas, can reflect the dynamic evaluation index of the power supply regulation capacity of the peak regulation capacity and the relative proportion of the generated electricity of the water storage capacity of the reservoir in the current reservoir state through the static evaluation index of the reservoir regulation capacity capable of reflecting the absolute regulation capacity and the relative regulation capacity of the reservoir and the dynamic evaluation index of the reservoir regulation capacity for regulating the runoff capacity in the future, can reflect the proportion of wind and light resources which can be regulated by hydropower, the ratio of the actually consumed water and wind electricity quantity to a theoretical value, the use efficiency of a channel after hydropower regulation and the evaluation index of the hydropower regulation benefit capable of reflecting the capacity of total output power close to the power grid load, evaluates the hydropower station regulation capacity of water, wind and light integration with large difference of regulation capacity, strong uncertainty, multiple influence factors and complex power grid load from multiple dimensions, and realizes reasonable evaluation on the runoff regulation capacity of the hydropower station and the capacity for meeting the power grid load requirement.
Further, the determining of the static evaluation index of the regulating capacity of the reservoir specifically comprises:
acquiring normal water storage level and reservoir dead water level in reservoir capacity data of a target hydropower station, constructing a reservoir capacity curve, and determining reservoir regulation capacity;
acquiring the average water inflow amount in the reservoir capacity data of a target hydropower station, and determining a reservoir capacity coefficient by combining the reservoir regulation capacity;
and evaluating the static regulating capacity of the reservoir according to the regulating capacity and the reservoir capacity coefficient.
Further, the determining of the dynamic evaluation index of the regulating capacity of the reservoir specifically includes:
and acquiring the normal water storage level of the reservoir and the actual water storage level of the reservoir at the end of the t-th time period, constructing a reservoir capacity curve, determining the full storage rate at the t-th time period, and evaluating the dynamic regulation capacity of the reservoir.
Further, the step of calculating the adjusted storage capacity specifically includes:
v r ＝f z,v (z n )-f z,v (z d )
in the formula: v. of r Regulating storage capacity for reservoir, f z,v () Is a curve of reservoir capacity, z n Is a normal water storage level z d The reservoir dead water level; the step of calculating the storage capacity coefficient specifically comprises the following steps:
in the formula:
the average amount of the water coming for many years; beta is a storage capacity coefficient;
the step of calculating the full storage rate specifically includes:
in the formula: t is a time period number and,
is the fill rate of the t-th period, z t The actual water storage level of the reservoir at the end of the t-th time period.
Further, the determining of the dynamic evaluation index of the power supply regulation capability of the hydropower station specifically includes:
acquiring the maximum adjustable output, the minimum technical output and the installed capacity of a hydropower station in one period of a reservoir, and determining the peak regulation amplitude;
acquiring a normal water storage level and an actual water storage level of a reservoir at the end of the t-th time period, and determining an energy storage ratio of the t-th time period;
and evaluating the power supply regulation capacity of the hydropower station according to the peak regulation amplitude and the energy storage ratio in the t-th time period.
Further, the peak shaving amplitude calculation step specifically includes:
in the formula, sigma is the peak regulation capacity of the power station; p max 、P min Respectively representing the maximum and minimum power generation output of the power station; delta P is the power generation peak-valley difference of the power station; n is the installed capacity of the power station;
the energy storage ratio calculating step specifically comprises:
in the formula:
the energy storage ratio of the t-th period.
Further, the determining of the hydropower station hydropower regulation benefit evaluation index specifically includes:
acquiring installed capacity of a hydropower station and wind power and photovoltaic installed capacity which can be adjusted by the hydropower station, and determining a water-wind-light ratio;
acquiring actual generated energy of hydropower, wind power and photovoltaic power generation and abandoned electric quantity of a hydropower station, and determining the utilization rate of water, wind and light;
acquiring the electric quantity of all power supplies actually transmitted through a channel s in a time period T, and the theoretical power transmission capacity of the channel s, and determining the utilization rate of a power transmission channel s;
acquiring the power generation output in the T-th time period, the electrical load in the T-th time period, the average load level, and T which is the total time period, and determining a load tracking coefficient;
and respectively evaluating the water and wind power regulation benefits according to the water and wind power ratio, the water and wind power utilization ratio, the utilization ratio of the power transmission channel s and the load tracking coefficient.
Further, the calculation of the water-wind-solar ratio specifically comprises the following steps:
in the formula: p is the water-wind-light ratio, N w 、N p Respectively representing wind power and photovoltaic installed capacity which can be adjusted by the hydropower station, and N representing installed capacity of the hydropower station;
the calculation steps of the water and wind and light utilization rate specifically comprise:
in the formula: u is water and wind utilization rate, E, E w 、E p Actual generated energy of hydropower, wind power and photovoltaic power generation are respectively adopted, and delta E is abandoned electric quantity;
the channel utilization calculation step specifically includes:
in the formula: alpha is alpha s For the utilization of the transmission channel s, E s The electric quantity of all power supplies actually transmitted through the channel s in the time period T, C s Is the theoretical transmission capacity of channel s, M T Is the number of hours in time T;
the load tracking coefficient calculating step specifically includes:
in the formula: ρ is the load tracking coefficient, T is the total number of time periods, N t Is the power generation output of the t-th period, L t Is the electric load for the t-th time period,
is the average load level.
A second aspect of the invention provides an electronic device comprising a memory, a processor and a computer program stored on the memory and executable on the processor, the processor implementing a method for hydropower station regulation capacity evaluation when executing the program.
A third aspect of the invention provides a computer-readable storage medium having stored thereon a computer program which, when executed by a processor, implements a method of hydropower station regulation capacity evaluation.
Compared with the prior art, the invention has the following advantages and beneficial effects:
according to the hydropower station regulation method, the abundant hydropower station types in the hydropower resource enrichment area are combined, a set of reasonable index system and an evaluation flow are set, the evaluation indexes are rich and various, the system is well-arranged, the regulation capability of the hydropower station integrating water, wind and light, which is large in regulation capability difference, strong in uncertainty, multiple in influencing factors and complex, is evaluated from multiple dimensions, and the requirements of the hydropower station on the capability of regulating runoff and the capability of meeting the power grid load requirements can be reasonably evaluated.
Drawings
In order to more clearly illustrate the technical solutions of the exemplary embodiments of the present invention, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and that for those skilled in the art, other related drawings can be obtained from these drawings without inventive effort. In the drawings:
FIG. 1 is a flow chart of an evaluation method in an embodiment of the present invention;
fig. 2 is a power output diagram of category 5 power of a certain power grid in an embodiment of the present invention;
FIG. 3 is a diagram illustrating a wind power dispatching map in a certain area according to an embodiment of the present invention;
FIG. 4 is a plot of a regional dispatch photovoltaic force diagram in an embodiment of the present invention;
fig. 5 is a diagram of the electric power regulating system in a certain area according to the embodiment of the invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail below with reference to examples and accompanying drawings, and the exemplary embodiments and descriptions thereof are only used for explaining the present invention and are not meant to limit the present invention.
Example 1
As shown in fig. 1, a first aspect of this embodiment provides a method for evaluating a regulation capability of a hydropower station, including the following specific steps:
acquiring reservoir capacity data of a target hydropower station, and determining a reservoir regulation capacity static evaluation index and a reservoir regulation capacity dynamic evaluation index;
acquiring load data of each unit in a target time period of a target hydropower station, and determining a dynamic evaluation index of the power supply regulation capacity of the hydropower station;
acquiring installed data of a target hydropower station, power generation data and power transmission data in a target time period, and determining hydropower regulation benefit evaluation indexes of the hydropower station;
and evaluating the regulating capacity of the hydropower station according to the reservoir regulating capacity static evaluation index, the reservoir regulating capacity dynamic evaluation index, the power supply regulating capacity dynamic evaluation index and the hydropower regulating benefit evaluation index.
The hydropower station regulation capacity evaluation method combines abundant hydropower station types in hydropower resource enrichment areas, can reflect the dynamic evaluation index of the power supply regulation capacity of the peak regulation capacity and the relative proportion of the generated electricity of the water storage capacity of the reservoir in the current reservoir state through the static evaluation index of the reservoir regulation capacity capable of reflecting the absolute regulation capacity and the relative regulation capacity of the reservoir and the dynamic evaluation index of the reservoir regulation capacity for regulating the runoff capacity in the future, can reflect the proportion of wind and light resources which can be regulated by hydropower, the ratio of the actually consumed water and wind electricity quantity to a theoretical value, the use efficiency of a channel after hydropower regulation and the evaluation index of the hydropower regulation benefit capable of reflecting the capacity of total output power close to the power grid load, evaluates the hydropower station regulation capacity of water, wind and light integration with large difference of regulation capacity, strong uncertainty, multiple influence factors and complex power grid load from multiple dimensions, and realizes reasonable evaluation on the runoff regulation capacity of the hydropower station and the capacity for meeting the power grid load requirement.
In some possible embodiments, determining the static evaluation index of the regulating capacity of the reservoir specifically includes:
acquiring normal water storage level and reservoir dead water level in reservoir capacity data of a target hydropower station, constructing a reservoir capacity curve, determining reservoir regulation capacity, and regulating the reservoir capacity: the regulated reservoir capacity refers to the reservoir capacity for providing regulated runoff for the benefits of hydroelectric generation, shipping, water supply, irrigation and the like, namely the reservoir capacity between the normal water storage level and the dead water level. Under the condition of the same runoff quantity, the larger the regulating reservoir capacity is, the stronger the regulating capacity is;
acquiring the average water inflow amount in the reservoir capacity data of a target hydropower station, and determining a reservoir capacity coefficient by combining the reservoir regulation capacity, wherein the reservoir capacity coefficient is as follows: the storage capacity coefficient is the ratio of the regulated storage capacity of the reservoir to the average amount of water coming from many years, and is normally in positive correlation with the regulating capacity of the reservoir, namely the regulating capacity is increased along with the increase of the storage capacity coefficient, and the corresponding relationship of the regulating capacity and the average amount of water coming from many years is shown in table 1:
TABLE 1 corresponding relationship between storage capacity coefficient and adjustment capability
In some possible embodiments, determining the dynamic evaluation index of the reservoir regulation capacity specifically includes:
the method comprises the steps of obtaining a normal water storage level of a reservoir and an actual water storage level of the reservoir at the end of a t-th time period, constructing a reservoir capacity curve of the reservoir, determining a full storage rate of the t-th time period, evaluating dynamic adjusting capacity of the reservoir, defining the full storage rate as a ratio of an actual water storage amount of the reservoir in a certain period of a water storage period to a total reservoir capacity, and indicating that the greater the full storage rate is, the closer the water level of the reservoir is to the normal water storage level, the worse the adjusting capacity is.
In some possible embodiments, the adjusting the storage capacity calculation step specifically includes:
v r ＝f z,v (z n )-f z,v (z d )
in the formula: v. of r Regulating reservoir capacity for reservoirs, f z,v () Is a reservoir capacity curve, z n Is a normal water storage level z d Is the reservoir dead water level; the step of calculating the storage capacity coefficient specifically comprises the following steps:
in the formula:
the average amount of the water coming for many years; beta is a storage capacity coefficient;
the step of calculating the full storage rate specifically includes:
in the formula: t is a time period number and,
is the fill rate of the t-th period, z t The actual water storage level of the reservoir at the end of the t-th time period.
In some possible embodiments, determining a dynamic evaluation index of the power supply regulation capability of the hydropower station specifically includes:
acquiring the maximum adjustable output, the minimum technical output and the installed capacity of a hydropower station in one period of a reservoir, and determining the peak regulation amplitude;
acquiring a normal water storage level and an actual water storage level of a reservoir at the end of the t-th time period, and determining an energy storage ratio of the t-th time period;
and evaluating the power supply regulation capacity of the hydropower station according to the peak regulation amplitude and the energy storage ratio in the t-th time period.
Wherein, for the regulating power supply such as water and electricity, the difference value between the maximum adjustable output and the minimum technical output is the peak regulation capacity. The ratio of the installed capacity of the peak regulation capability power supply is the peak regulation amplitude, and the larger the peak regulation amplitude is, the stronger the power supply regulation capability is. The peak regulation amplitude of the hydropower station and the gas power station can reach 100 percent, the power generation output can be changed from 0 to the installed capacity, and the peak regulation amplitude of the common coal-fired thermal power station is generally about 50 to 100 percent;
because the production, transmission, distribution and use of the electric energy are completed at the same time, the production enterprises requiring the electric power system can meet the basic load requirement of the electric power system and can adjust the production, namely peak shaving, in time according to the instantaneous change of the electric power load. The peak shaving is planned generator end load adjustment according to a certain adjusting speed for the requirement of load peak-valley change. In terms of time period, peak shaving generally refers to daily behavior with a 24-hour period, which is related to the characteristic that daily load changes cyclically with a 24-hour period.
The energy storage ratio is defined as the ratio of the residual water storage capacity of each month (ten days) to the total storage capacity in the water level falling process of the reservoir in the water supply period, and the larger the energy storage ratio is, the stronger the power supply capacity of the power station is, and the stronger the corresponding ground adjustment capacity is.
In some possible embodiments, the step of calculating the peak shaver amplitude specifically comprises:
wherein sigma is the power station peak regulation capacity; p max 、P min Respectively representing the maximum and minimum power generation output of the power station; delta P is the power generation peak-valley difference of the power station; n is the installed capacity of the power station;
the energy storage ratio calculation step specifically comprises the following steps:
in the formula:
the energy storage ratio of the t-th period.
In some possible embodiments, determining the hydropower station hydropower regulation benefit evaluation index specifically includes:
acquiring installed capacity of a hydropower station and wind power and photovoltaic installed capacity which can be adjusted by the hydropower station, and determining water-wind-light ratio;
acquiring actual generated energy of hydropower, wind power and photovoltaic power generation and abandoned electric quantity of a hydropower station, and determining the utilization rate of water, wind and light;
acquiring the electric quantity of all power supplies actually transmitted through a channel s in a T time period, and determining the utilization rate of a power transmission channel s according to the theoretical power transmission capacity of the channel s;
acquiring the power generation output in the T-th time period, the power load in the T-th time period, the average load level and T as the total time period, and determining a load tracking coefficient;
and respectively evaluating the water and wind power regulation benefits according to the water and wind power ratio, the water and wind power utilization ratio, the utilization ratio of the power transmission channel s and the load tracking coefficient.
Wherein, the water-wind-light ratio: the ratio of the wind-solar energy installation and the water-electricity installation which can be adjusted by water and electricity is defined as the ratio of the wind-solar energy installation and the water-electricity installation which can be adjusted by water and electricity under the condition of certain electricity abandoning rate (such as 5%), and the larger the ratio is, the more the wind and the light can be adjusted by water and electricity, the better the adjusting benefit is and the stronger the adjusting capability is.
Water wind light utilization ratio: the ratio of the water wind light electric quantity actually consumed by the power grid to the water wind light theoretical electric quantity is defined. The larger the water and wind utilization rate is, the smaller the total electricity abandonment rate is, the stronger the water and electricity regulation capacity is, and the better the regulation benefit is.
The channel utilization rate is as follows: the ratio of the electric quantity transmitted through a certain power transmission channel in a certain time to the theoretical power transmission quantity of the channel is defined, and the higher the channel utilization rate is, the more stable the electric power transmitted by a power source bundle in the channel is, the stronger the capability of the water power for stabilizing the wind and light fluctuation is, and the better the adjusting benefit is.
Load tracking coefficient: the intermittent, random and fluctuating properties of wind power generation and photovoltaic power generation are stabilized to the greatest extent by utilizing the adjustment of the reservoir power station, so that the total output power is closer to the load level of a power grid, and the influence on the operation of the power grid is minimum. In order to analyze the influence of renewable energy power generation systems such as wind power generation and photovoltaic power generation on loads, a load tracking coefficient rho is defined to quantitatively evaluate the characteristics of various power supply tracking loads. The larger the load tracking coefficient is, the better the matching degree of the power generation process and the load process of the power station is, the better the adjusting benefit of the hydropower is, and the stronger the adjusting capacity is.
In some possible embodiments, the step of calculating the water-wind-light ratio specifically includes:
in the formula: p is the water-wind-light ratio, N w 、N p Respectively representing wind power and photovoltaic installed capacity which can be adjusted by the hydropower station, and N representing installed capacity of the hydropower station;
the calculation steps of the water and wind and solar utilization rate specifically comprise:
in the formula: u is the water and wind utilization rate, E, E w 、E p Respectively the actual generated energy of hydroelectric power, wind power and photovoltaic power generation, and Delta E is abandonedAn amount of electricity;
the channel utilization calculation step specifically comprises:
in the formula: alpha (alpha) ("alpha") s For the utilization of the transmission channel s, E s The electric quantity of all power supplies actually transmitted through the channel s in the time period T, C s Is the theoretical transmission capacity of channel s, M T Is the number of hours in time T;
the load tracking coefficient calculating step specifically comprises the following steps:
in the formula: ρ is the load tracking coefficient, T is the total number of time periods, N t Is the power generation output of the t-th period, L t Is the electric load of the t-th time period,
is the average load level.
In a second aspect, the present embodiment provides an electronic device, which includes a memory, a processor, and a computer program stored in the memory and executable on the processor, and when the processor executes the computer program, the processor implements a hydropower station regulation capability evaluation method.
A third aspect of the present embodiments provides a computer-readable storage medium having stored thereon a computer program which, when executed by a processor, implements a method for hydropower station regulation capacity evaluation.
Example 2
The total installation of 5 types of power supplies of a certain water energy enrichment power grid is 6612 ten thousand kW, and the typical daily average load shown in figure 2 is 4362 ten thousand kW. The daily load is 4702 ten thousand kW at maximum load, which occurs at 1 noon, 3933 ten thousand kW at minimum load, which occurs at 7 in the morning.
(1) Wind power generation
The wind power total installation of a certain power grid is 585 ten thousand kW, and the typical average daily generated output shown in FIG. 3 is 35 ten thousand kW. The maximum power generation output is 117 ten thousand kW, appears at 0 night, the minimum power generation output is 4 ten thousand kW, appears at 11 noon, the peak-valley difference is 113 ten thousand kW, and the output variation is 19%.
(2) Photovoltaic system
The photovoltaic total installation of a certain power grid overall regulation is 169 ten thousand kW, and the typical daily average generated output shown in FIG. 4 is 44 ten thousand kW. The maximum generated output is 128 kW, occurring at 12 noon: 00, at night 0.
(3) Water and electricity
The total installed power of hydropower of a certain power grid is 4394 ten thousand kW, and the typical average daily generated power shown in figure 5 is 3326 ten thousand kW. The daily maximum power generation output is 3496 ten thousand kW, and occurs at night 11, 00, and the minimum power generation output is 3174 ten thousand kW, and occurs in the morning 7:00, the peak-to-valley difference is 322 ten thousand kW, and the adjustment amplitude is 7%.
The regulation capacity situation of a grid backbone hydroelectric station is indicated by the subscript. The hydropower stations with the performance of season regulation and above in hydropower stations of a certain power grid are 30, and the total installation amount is 1469 ten thousand kW, which accounts for about 33 percent of the total installation amount of the main hydropower station; the typical average daily power generation output is 1102 ten thousand kW, the maximum daily power generation output is 1213 ten thousand kW, and occurs at 9 am: 00, the minimum power generation output is 1036 ten thousand kW, the minimum power generation output appears at 0 night, the peak-to-valley difference is 177 ten thousand kW, and the adjustment amplitude is 12%. The total number of the other 251 bases with weaker adjusting performance is 2925 ten thousand kW in accumulated installation, and the accumulated total number accounts for 67 percent of the total installation of the master-control hydropower station; the typical daily average power generation output is 2216 ten thousand kW, the daily maximum power generation output is 2338 ten thousand kW, occurs at night 10, the minimum power generation output is 2120 ten thousand kW, occurs at night 7, the peak-to-valley difference is 218 ten thousand kW, the regulation amplitude is 7%, as shown in Table 2:
TABLE 2 evaluation table for regulation ability of backbone hydropower station of certain power grid (unit: ten thousand kW)
The above-mentioned embodiments, objects, technical solutions and advantages of the present invention are further described in detail, it should be understood that the above-mentioned embodiments are only examples of the present invention, and are not intended to limit the scope of the present invention, and any modifications, equivalent substitutions, improvements and the like made within the spirit and principle of the present invention should be included in the scope of the present invention.
Claims (10)
1. The hydropower station regulation capacity evaluation method is characterized by comprising the following specific steps of:
acquiring reservoir capacity data of a target hydropower station, and determining a reservoir regulation capacity static evaluation index and a reservoir regulation capacity dynamic evaluation index;
acquiring load data of each unit in a target time period of a target hydropower station, and determining a dynamic evaluation index of the power supply regulation capacity of the hydropower station;
acquiring installed data of a target hydropower station, power generation data and power transmission data in a target time period, and determining hydropower regulation benefit evaluation indexes of the hydropower station;
and evaluating the regulating capacity of the hydropower station according to the static evaluating index of the regulating capacity of the reservoir, the dynamic evaluating index of the regulating capacity of the power supply and the evaluating index of the water and electricity regulating benefit.
2. The method for evaluating the regulating power of the hydropower station according to claim 1, wherein the determining of the static evaluation index of the regulating power of the reservoir specifically comprises:
acquiring a normal water storage level and a reservoir dead water level in reservoir capacity data of a target hydropower station, constructing a reservoir capacity curve, and determining reservoir regulated capacity;
acquiring the average water inflow amount in the reservoir capacity data of the target hydropower station, and determining a reservoir capacity coefficient by combining the reservoir regulation capacity;
and evaluating the static regulating capacity of the reservoir according to the regulating capacity and the reservoir capacity coefficient.
3. The method for evaluating the regulating power of the hydropower station according to claim 2, wherein the determining of the dynamic evaluation index of the regulating power of the reservoir specifically comprises:
and acquiring the normal storage level of the reservoir and the actual storage level of the reservoir at the end of the t-th time period, constructing a reservoir capacity curve, determining the full storage rate at the t-th time period, and evaluating the dynamic regulation capacity of the reservoir.
4. The method for evaluating the adjustment capability of the hydropower station according to claim 3, wherein the step of calculating the adjustment reservoir capacity specifically comprises:
v r ＝f z,v (z n )-f z,v (z d )
in the formula: v. of r Regulating reservoir capacity for reservoirs, f z,v () Is a reservoir capacity curve, z n Is a normal water storage level z d Is the reservoir dead water level;
the step of calculating the storage capacity coefficient specifically comprises:
in the formula:
the average amount of the water coming for many years; beta is a storage capacity coefficient;
the step of calculating the full storage rate specifically includes:
in the formula: t is a time period number and,
is the fill rate of the t-th period, z t The actual water storage level of the reservoir at the end of the t time period.
5. The method for evaluating the adjustment capability of the hydropower station according to claim 1, wherein the determining of the dynamic evaluation index of the power supply adjustment capability of the hydropower station specifically comprises:
acquiring the maximum adjustable output, the minimum technical output and the installed capacity of a hydropower station in one period of a reservoir, and determining the peak regulation amplitude;
acquiring a normal water storage level and an actual water storage level of a reservoir at the end of the t-th time period, and determining an energy storage ratio of the t-th time period;
and evaluating the power supply regulation capacity of the hydropower station according to the peak regulation amplitude and the energy storage ratio in the t-th time period.
6. The method for evaluating the regulating power of the hydropower station according to claim 5, wherein the step of calculating the peak amplitude specifically comprises:
in the formula, sigma is the peak regulation capacity of the power station; p max 、P min Respectively representing the maximum and minimum power generation output of the power station; delta P is the power generation peak-valley difference of the power station; n is the installed capacity of the power station;
the energy storage ratio calculating step specifically comprises:
in the formula:
the energy storage ratio of the t-th period.
7. The method for evaluating the regulating capacity of the hydropower station according to claim 1, wherein the step of determining the evaluation index of the regulating efficiency of the hydropower station specifically comprises the following steps:
acquiring installed capacity of a hydropower station and wind power and photovoltaic installed capacity which can be adjusted by the hydropower station, and determining water-wind-light ratio;
acquiring actual generated energy of hydropower, wind power and photovoltaic power generation and abandoned electric quantity of a hydropower station, and determining the utilization rate of water, wind and light;
acquiring the electric quantity of all power supplies actually transmitted through a channel s in a T time period, and determining the utilization rate of a power transmission channel s according to the theoretical power transmission capacity of the channel s;
acquiring the power generation output in the T-th time period, the power load in the T-th time period, the average load level and T as the total time period, and determining a load tracking coefficient;
and respectively evaluating the water and wind power regulation benefits according to the water and wind power ratio, the water and wind power utilization ratio, the utilization ratio of the power transmission channel s and the load tracking coefficient.
8. The method for evaluating the adjustment capability of the hydropower station according to claim 7, wherein the step of calculating the water-wind-solar ratio specifically comprises the steps of:
in the formula: p is water-wind-light ratio, N w 、N p Respectively representing wind power and photovoltaic installed capacity which can be adjusted by the hydropower station, and N representing installed capacity of the hydropower station;
the calculation steps of the water and wind and solar utilization rate specifically comprise:
in the formula: u is water and wind utilization rate, E, E w 、E p Actual generated energy of hydropower, wind power and photovoltaic power generation are respectively adopted, and delta E is abandoned electric quantity;
the channel utilization calculation step specifically includes:
in the formula: alpha is alpha s For the utilization of the transmission channel s, E s The electric quantity of all power supplies actually transmitted through the channel s in the time period T, C s Is the theoretical transmission capacity of channel s, M T Is the number of hours in time T;
the load tracking coefficient calculating step specifically includes:
in the formula: ρ is the load tracking coefficient, T is the total number of time periods, N t Is the power generation output of the t-th period, L t Is the electric load of the t-th time period,
is the average load level.
9. An electronic device comprising a memory, a processor and a computer program stored on the memory and executable on the processor, wherein the processor, when executing the program, implements a method of hydropower station regulation capacity evaluation according to any one of claims 1 to 8.
10. A computer-readable storage medium, on which a computer program is stored, which program, when being executed by a processor, carries out a method of hydropower station regulation capacity evaluation according to any one of claims 1 to 8.
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| CN117639111B (en) * | 2024-01-25 | 2024-04-09 | 南京南瑞水利水电科技有限公司 | Photovoltaic fluctuation smooth control method and system based on step radial flow type hydropower |
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