A method for regulating the power generation of a hydropower station

Abstract

The application provides a hydropower station power generation capacity adjusting method, relates to the field of hydropower dispatching, and particularly relates to a hydropower station power generation capacity adjusting method, which comprises the following steps: selecting an adjusting mode and determining a power generation proportion under the adjusting mode; setting a tentative operation time and a tentative operation day of a hydropower station unit group to determine a monthly power generation plan; estimating a total power generation capacity according to an already generated power generation capacity and the monthly power generation plan of the hydropower station unit group; calculating a proportional total monthly power generation capacity according to the power generation proportion corresponding to the adjusting mode; estimating an expected evaluation power generation capacity and an expected reward power generation capacity in combination with an evaluation standard and a reward coefficient; and adjusting a proportion coefficient to make the expected evaluation power generation capacity meet a constraint condition of the evaluation standard. The hydropower station power generation capacity adjusting method has the beneficial effects that: the power generation plan can be simulated in combination with water quantity and peak regulation requirements, the expected evaluation power generation capacity and the expected reward power generation capacity are estimated, the basis for adjusting the power generation plan is obtained, the power generation plan meets the evaluation standard and the reward power generation capacity is obtained, the cost is reduced, and economic benefits are obtained.

Description

Technical Field

[0001] This invention relates to the field of hydropower dispatching, and more specifically to a method for regulating the power generation of a hydropower station. Background Technology

[0002] The development of small hydropower stations in my country is very rapid. Although the individual unit capacity of small hydropower stations is small, their numbers are large and they can provide a considerable amount of electricity overall.

[0003] However, small hydropower stations are generally not subject to unified dispatch, and their power generation plans are constrained by factors such as assessment standards, requirements of large power stations, and the need to undertake the function of ensuring power supply in isolated grids, making it difficult to make effective estimates. Summary of the Invention

[0004] To address the problems mentioned above, this invention provides a method for regulating the power generation of a hydropower station. This method can simulate the power generation plan to estimate the expected assessment power and the expected bonus power, and adjust the power generation plan to meet the assessment standards, thereby achieving economic benefits and reducing costs.

[0005] To achieve the above objectives, the present invention provides a method for regulating the power generation of a hydropower station, the steps of which are as follows:

[0006] S1 selects the regulation mode, including the wet season, the normal season and the dry season, and determines the peak, normal, valley and peak power generation ratios corresponding to the regulation mode;

[0007] S2 sets the planned operating time and number of planned operating days for the hydropower station unit group to determine the remaining monthly power generation plan;

[0008] S3 estimates the total monthly power generation based on the already generated power and the monthly power generation plan of the hydropower station group;

[0009] S4 calculates the total monthly electricity that can be generated proportionally based on the power generation ratio corresponding to the adjustment mode.

[0010] S5 estimates the expected assessment electricity and expected reward electricity by combining the monthly power generation plan, the proportionally achievable total monthly electricity volume, and the reward coefficient;

[0011] S6 determines whether the expected assessment power volume meets the constraints of the assessment standard. If the expected assessment power volume does not meet the constraints, the peak, flat, valley, and peak power generation ratios in step S1 are adjusted, and steps S2 to S5 are continued until the expected assessment power volume meets the constraints of the assessment standard.

[0012] Furthermore, in the adjustment mode of step S1, the power generation ratio during the peak, average, valley, and peak periods of the wet season is 1:x. 2m :x 3m :x 4m During the normal water period, the power generation ratio of peak, average, valley, and peak periods is 1:x2l :x 3l :x 4l During the dry season, the power generation ratio of peak, average, valley, and peak periods is 1:x 2n :x 3n :x 4n .

[0013] Furthermore, in step S2, the hydropower station unit group includes N units, each with 2 loads.

[0014] Furthermore, the peak operating time for two of the N units is 6 hours per day;

[0015] The daily average operating time is 8 hours.

[0016] The daily operating time for the valley segment is 8 hours;

[0017] The peak operating time is 2 hours per day.

[0018] Furthermore, in step S2, the power generation plan for the hydropower unit group is as follows:

[0019]

[0020] Where C, D, E, and F represent the remaining monthly planned power generation during peak, average, valley, and peak periods, respectively. ij For the peak load of the i-th unit at the j-th load, zc ij d represents the generation time of the j-th load of the i-th unit during peak hours. ij For the power generation of the i-th unit at the j-th load in the flat section, zd ij e represents the power generation time of the j-th load of the i-th unit in the flat section. ij The power generation of the i-th unit at the j-th load in the valley section, ze ij f represents the generation time of the j-th load of the i-th unit during the valley segment. ij For the power generation of the i-th unit at the j-th load in the peak section, zf ij Let T be the generation time of the j-th load of the i-th unit in the peak segment, where i = 1, 2, 3... N, j = 1, 2, T i It represents the planned number of operating days for the i-th unit.

[0021] Furthermore, in step S3, the estimated total power generation is:

[0022]

[0023] Among them, C1 and C0 are the expected total peak electricity consumption and the peak electricity consumption already generated for the month, respectively; D1 and D0 are the expected total flat electricity consumption and the flat electricity consumption already generated for the month, respectively; E1 and E0 are the expected total valley electricity consumption and the valley electricity consumption already generated for the month, respectively; and F1 and F0 are the expected total peak electricity consumption and the peak electricity consumption already generated for the month, respectively.

[0024] Furthermore, in step S4, the proportion of the total monthly electricity consumption can be as follows:

[0025] The expression for the proportion of total monthly electricity generated during the high-water season is as follows:

[0026]

[0027] Among them, A 2m A 3m A 4m These are the proportions of the total monthly average electricity generation during the high-water season, the proportions of the total monthly average electricity generation during the valley season, and the proportions of the total monthly peak season electricity generation.

[0028] The expression for the proportion of total monthly electricity generated during the normal water period is:

[0029]

[0030] Among them, A 2l A 3l A 4l These are the proportions of the total monthly average electricity volume that can be generated during the normal water period, the proportion of the total monthly average electricity volume that can be generated during the valley period, and the proportion of the total monthly peak period electricity volume that can be generated during the peak water period.

[0031] The proportion of total monthly electricity generated during the dry season can be expressed as follows:

[0032]

[0033] Among them, A 2n A 3n A 4n These are the percentages of the total monthly average electricity generation during the dry season, the percentage of the total monthly average electricity generation during the valley season, and the percentage of the total monthly peak season electricity generation.

[0034] Furthermore, in step S5, the assessment criteria are as follows:

[0035]

[0036] Among them, C f C p C k These are the monthly electricity consumption standards for the high-water season, normal-water season, and low-water season, respectively, and w is the annual planned electricity consumption.

[0037] Furthermore, in step S5 or step S6, the expected amount of electricity to be assessed is:

[0038] During the high-water season, the expression for the estimated assessment electricity volume B1 is:

[0039]

[0040] During the normal water season, the expression for the expected assessment electricity volume B1 is:

[0041]

[0042] During the dry season, the expression for the estimated assessment electricity volume B1 is:

[0043]

[0044] Furthermore, in step S5, the expected reward power is:

[0045] During the high-water season, the expression for the expected bonus electricity B2 is:

[0046]

[0047] Among them, J m This refers to the bonus coefficient during the high-water season.

[0048] During the normal water period, the expression for the expected bonus electricity B2 is:

[0049]

[0050] Among them, J l This refers to the bonus coefficient during the normal water season.

[0051] During the dry season, the expression for the expected bonus electricity B2 is:

[0052]

[0053] Among them, J n This is the bonus coefficient for the dry season.

[0054] Furthermore, the estimated assessment electricity volume B1 should meet the following constraints:

[0055] When the regulation mode is set to the high-water season, B1 must be greater than or equal to C. f ;

[0056] When the regulation mode is in the normal water period, B1 >= C must be true. p ;

[0057] When the regulation mode is set to dry season, B1 >= C must be met. k .

[0058] Beneficial effects: This invention can simulate the power generation plan by combining water volume and peak shaving requirements, estimate the expected assessment power volume and the expected bonus power volume, obtain the basis for adjusting the power generation plan and make adjustments so that the power generation plan meets the assessment standards and obtains bonus power volume, thereby reducing costs and obtaining economic benefits. Attached Figure Description

[0059] The present invention will be further described below with reference to the accompanying drawings and embodiments:

[0060] Figure 1 This is a flowchart of the method of the present invention. Detailed Implementation

[0061] Example 1

[0062] like Figure 1 As shown, a method for regulating the power generation of a hydropower station includes the following steps:

[0063] S1 selects the regulation mode, including the high-water season, normal-water season, and low-water season, and determines the peak, normal, valley, and peak power generation ratios corresponding to the regulation mode, specifically as follows:

[0064] The power generation ratio during the high-water season, including peak, average, valley, and peak periods, is 1:x 2m :x 3m :x 4m During the normal water period, the power generation ratio of peak, average, valley, and peak periods is 1:x 2l :x 3l :x 4l During the dry season, the power generation ratio of peak, average, valley, and peak periods is 1:x 2n :x 3n :x 4n .

[0065] S2 sets the planned operating time and number of planned operating days for the hydropower station unit group to determine the monthly power generation plan. The hydropower station unit group includes N units, each with 2 loads. The monthly power generation plan is as follows:

[0066]

[0067] Where C, D, E, and F represent the remaining monthly planned power generation during peak, average, valley, and peak periods, respectively. ij For the peak load of the i-th unit at the j-th load, zc ij d represents the generation time of the j-th load of the i-th unit during peak hours. ij For the power generation of the i-th unit at the j-th load in the flat section, zd ij e represents the power generation time of the j-th load of the i-th unit in the flat section. ij The power generation of the i-th unit at the j-th load in the valley section, ze ijf represents the generation time of the j-th load of the i-th unit during the valley segment. ij For the power generation of the i-th unit at the j-th load in the peak section, zf ij Let T be the generation time of the j-th load of the i-th unit in the peak segment, where i = 1, 2, 3... N, j = 1, 2, T i It represents the planned number of operating days for the i-th unit.

[0068] S3 estimates the total power generation based on the already generated electricity and the monthly power generation plan of the hydroelectric power station group. The total power generation can be expressed as:

[0069]

[0070] Among them, C1 and C0 are the expected total peak electricity consumption and the peak electricity consumption already generated for the month, respectively; D1 and D0 are the expected total flat electricity consumption and the flat electricity consumption already generated for the month, respectively; E1 and E0 are the expected total valley electricity consumption and the valley electricity consumption already generated for the month, respectively; and F1 and F0 are the expected total peak electricity consumption and the peak electricity consumption already generated for the month, respectively.

[0071] S4 calculates the proportional monthly total electricity that can be generated based on the power generation ratio corresponding to the regulation mode. The calculation process is as follows:

[0072] The expression for the proportion of total monthly electricity generated during the high-water season is as follows:

[0073]

[0074] Among them, A 2m A 3m A 4m These are the proportions of the total monthly average electricity generation during the high-water season, the proportions of the total monthly average electricity generation during the valley season, and the proportions of the total monthly peak season electricity generation.

[0075] The expression for the proportion of total monthly electricity generated during the normal water period is:

[0076]

[0077] Among them, A 2l A 3l A 4l These are the proportions of the total monthly average electricity volume that can be generated during the normal water period, the proportion of the total monthly average electricity volume that can be generated during the valley period, and the proportion of the total monthly peak period electricity volume that can be generated during the peak water period.

[0078] The proportion of total monthly electricity generated during the dry season can be expressed as follows:

[0079]

[0080] Among them, A 2n A 3n A 4nThese are the percentages of the total monthly average electricity generation during the dry season, the percentage of the total monthly average electricity generation during the valley season, and the percentage of the total monthly peak season electricity generation.

[0081] S5 estimates the expected assessment electricity and expected bonus electricity based on the monthly power generation plan, the proportionally available total monthly electricity volume, and the incentive coefficient. The process is as follows:

[0082] Regarding the projected electricity consumption for assessment, we have:

[0083] During the high-water season, the expression for the estimated assessment electricity volume B1 is:

[0084]

[0085] During the normal water season, the expression for the expected assessment electricity volume B1 is:

[0086]

[0087] During the dry season, the expression for the estimated assessment electricity volume B1 is:

[0088] B1 = min[20% × [(max(D1-A)]] 2n ,0)+max(E1-A 3n ,0)+max(A 4n -F1,0)],

[0089] (0.5% × A) 2n +0.5%×A 3n +1.5%×A 4n )];

[0090] Regarding the expected bonus battery capacity, we have:

[0091] During the high-water season, the expression for the expected bonus electricity B2 is:

[0092]

[0093] Among them, J m This refers to the bonus coefficient during the high-water season.

[0094] During the normal water period, the expression for the expected bonus electricity B2 is:

[0095]

[0096] Among them, J l This refers to the bonus coefficient during the normal water season.

[0097] During the dry season, the expression for the expected bonus electricity B2 is:

[0098]

[0099] Among them, Jn This is the bonus coefficient for the dry season.

[0100] S6 determines whether the expected assessment power consumption meets the constraints of the assessment criteria, which are as follows:

[0101]

[0102] Among them, C f C p C k These are the monthly electricity consumption standards for the high-water season, normal-water season, and low-water season, respectively, and w is the annual planned electricity consumption.

[0103] The estimated assessment electricity volume B1 should meet the following constraints:

[0104] When the regulation mode is set to the high-water season, B1 must be greater than or equal to C. f ;

[0105] When the regulation mode is in the normal water period, B1 >= C must be true. p ;

[0106] When the regulation mode is set to dry season, B1 >= C must be met. k ;

[0107] When the expected assessment power generation does not meet the constraints, adjust the peak, flat, valley, and peak power generation ratios in step S1, and continue with steps S2 to S5 until the expected assessment power generation meets the constraints of the assessment standard.

[0108] Furthermore, the peak operating time for two of the N units is 6 hours per day;

[0109] The daily average operating time is 8 hours.

[0110] The daily operating time for the valley segment is 8 hours;

[0111] The peak operating time is 2 hours per day.

[0112] The above embodiments are merely preferred technical solutions of the present invention and should not be considered as limitations on the present invention. The scope of protection of the present invention should be limited to the technical solutions described in the claims, including equivalent substitutions of the technical features described in the claims. That is, equivalent substitutions and improvements within this scope are also within the scope of protection of the present invention.

Claims

1. A method for regulating the power generation of a hydropower station, characterized in that: Includes the following steps: S1 Selects the regulation mode, including the wet season, normal season and dry season, and determines the peak, normal, valley and peak power generation ratios corresponding to the regulation mode; The power generation ratio during the peak, average, valley, and peak periods of the high-water season is 1: x 2m : x 3m : x 4m During the normal water period, the power generation ratio of peak, average, valley, and peak periods is 1: x 2l : x 3l : x 4l During the dry season, the power generation ratio of peak, flat, valley, and high-water periods is 1: x 2n : x 3n : x 4n ; S2 sets the planned operating time and number of planned operating days for the hydropower station unit group to determine the remaining monthly power generation plan; The hydropower station unit group includes N Each unit has two loads; The power generation plan for the hydroelectric power unit group is as follows: （1）； in, C , D , E , F These are the remaining monthly power generation plans for peak, average, valley, and peak periods. c ij For the power generation of the i-th unit at the j-th load during peak hours, zc ij Let j be the power generation time of the i-th unit during peak load. d ij For the power generation of the i-th unit at the j-th load in the flat section, zd ij Let j be the power generation time of the i-th unit under load in the flat section. e ij The power generation of the i-th unit at the j-th load in the valley section, ze ij Let j be the power generation time of the i-th unit during the valley period. f ij For the power generation of the j-th load of the i-th unit in the peak section, zf ij Let j be the generation time of the j-th load of the i-th unit in the peak segment, i=1,2,3... N j=1,2 T i It is the planned operating days for the i-th unit; S3 estimates the total monthly power generation based on the already generated power and the monthly power generation plan of the hydropower station group; The estimated total power generation is: （2）； in, C 1. C 0 represents the estimated total peak electricity consumption for the month and the peak electricity consumption already generated. D 1. D 0 represents the estimated total monthly average electricity consumption and the average electricity consumption already generated. E 1. E 0 represents the estimated total off-peak electricity consumption for the month and the off-peak electricity consumption already generated. F 1. F 0 represents the estimated total peak electricity consumption for the month and the peak electricity consumption already generated; S4 calculates the total monthly electricity that can be generated proportionally based on the power generation ratio corresponding to the adjustment mode; The proportion of total monthly electricity that can be generated is as follows: The expression for the proportion of total monthly electricity generated during the high-water season is as follows: （3）； in, A 2m , A 3m , A 4m These are the proportions of the total monthly average electricity generation during the high-water season, the proportions of the total monthly average electricity generation during the valley season, and the proportions of the total monthly peak season electricity generation. The expression for the proportion of total monthly electricity generated during the normal water period is: （4）； in, A 2l , A 3l , A 4l These are the proportions of the total monthly average electricity volume that can be generated during the normal water period, the proportion of the total monthly average electricity volume that can be generated during the valley period, and the proportion of the total monthly peak period electricity volume that can be generated during the peak water period. The proportion of total monthly electricity generated during the dry season can be expressed as follows: （5）； in, A 2n , A 3n , A 4n These are the proportions of the total monthly average electricity generation during the dry season, the proportions of the total monthly average electricity generation during the valley season, and the proportions of the total monthly peak season electricity generation. S5 estimates the expected assessment electricity and expected reward electricity by combining the monthly power generation plan, the proportionally available total monthly electricity, and the reward coefficient. The estimated assessment power consumption is: During the high-water season, the estimated power generation is expected to be [amount missing]. B The expression for 1 is: （6）； During the normal water season, the estimated power generation is expected to be [amount not specified]. B The expression for 1 is: （7）； During the dry season, the estimated power generation is expected to be [amount missing]. B The expression for 1 is: （8）； Expected assessment power consumption B The following constraints must be met: When the regulation mode is set to the high-water season, it must have B 1>= C f ; When the regulation mode is in the normal water period, it is necessary to have B 1>= C p ; When the regulation mode is set to dry season, it must have B 1>= C k ; The expected bonus battery capacity is: During the high-water season, the expected bonus electricity volume B The expression for 2 is: （9）； in, J m This refers to the bonus coefficient during the high-water season. During the normal water season, the expected bonus electricity volume B The expression for 2 is: （10）； in, J l This refers to the bonus coefficient during the normal water season. During the dry season, the expected bonus electricity volume B The expression for 2 is: （11）； in, J n This is the bonus coefficient for the dry season; S6 determines whether the expected assessment power volume meets the constraints of the assessment standard. If the expected assessment power volume does not meet the constraints, the peak, flat, valley and peak power generation ratios in step S1 are adjusted, and steps S2 to S5 are continued until the expected assessment power volume meets the constraints of the assessment standard. The assessment criteria are as follows: （12）； in, C f , C p , C k These are the monthly electricity consumption standards for the high-water season, the normal-water season, and the low-water season, respectively. w The planned electricity consumption for the year.

2. The method for regulating the power generation of a hydropower station according to claim 1, characterized in that: The aforementioned N Two of the units operate at peak loads for 6 hours per day. The daily average operating time is 8 hours. The daily operating time for the valley segment is 8 hours; The peak operating time is 2 hours per day.

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