Small hydropower station frequency prediction method based on weighted distribution
A technology of frequency prediction and weighted allocation, applied in the field of power system, which can solve the problems of lack of accuracy, large memory space, frequency control, etc.
Pending Publication Date: 2022-03-04
GUANGZHOU CITY UNIV OF TECH
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[0002] The frequency fluctuation problem of the small hydropower grid is more prominent. The existing small hydropower frequency adjustment methods, one is to adjust according to the frequency change. Due to the inertia of the water turbine, this type of adjustment method cannot timely control the frequency within a stable range; the other is It is based on a large amount of data to predict the frequency and adjust in advance. This type of method usually requires a large memory space, and the control equipment of small hydropower generally does not have enough storage space, which leads to the lack of accuracy of this type of adjustment method. sex
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[0027] The present invention will be described in further detail below in conjunction with the accompanying drawings and specific embodiments.
[0028] Such as figure 1 Shown; A small hydropower frequency prediction method based on weighted distribution, including the following steps;
[0029] Step (1). Take the last frequency of the last second of each minute of small hydropower operation as the reference frequency of each minute; record the current value of the reference frequency generated by the operation of small hydropower; store each reference frequency generated every minute separately value.
[0030] Step (2). Set the values of prediction interval C and standard interval A; prediction interval C is the time period of the frequency to be predicted within X minutes after the current time point; standard interval A is close to the time axis of prediction interval C and has a reference frequency Time period; prediction interval C, standard interval A, and X have the s...
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The invention provides a small hydropower station frequency prediction method based on weighted distribution. Setting numerical values of the same prediction interval and the standard interval; calculating the frequency of a prediction interval after the current time point at the reference frequency of the standard interval of the small hydropower station operation record; the operation duration of the small hydropower station is divided into n standard intervals A; then calculating a weighted value K corresponding to each standard interval A; and then calculating the average frequency E of the prediction interval. Setting the value range of the numerical value n; the minimum value of the value n is set to be 2, and the values of the standard interval A and the prediction interval C are the same; calculating the prediction frequency of the operation of the small and medium-sized hydropower stations in the prediction interval C through the reference frequency of the operation of the small and medium-sized hydropower stations in more than two standard intervals A; if n is not an integer, n is taken down as an integer, and a complete standard interval is used for calculation; the accuracy is high; the maximum value of the value n is set to be 10, so that the result reliability is improved; the calculation amount is reduced.
Description
technical field [0001] The invention relates to the technical field of power systems, in particular to a weighted distribution-based small hydropower frequency prediction method. Background technique [0002] The frequency fluctuation problem of the small hydropower grid is more prominent. The existing small hydropower frequency adjustment methods, one is to adjust according to the frequency change. Due to the inertia of the water turbine, this type of adjustment method cannot timely control the frequency within a stable range; the other is It is based on a large amount of data to predict the frequency and adjust in advance. This type of method usually requires a large memory space, and the control equipment of small hydropower generally does not have enough storage space, which leads to the lack of accuracy of this type of adjustment method. sex. Contents of the invention [0003] The invention provides a weighted distribution-based small hydropower frequency prediction ...
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IPC IPC(8): G06Q10/04G06Q10/06G06Q50/06
CPCG06Q10/04G06Q10/0639G06Q50/06Y04S10/50
Inventor 陈志峰王智东冯锺浩吴灿王玕周培源
Owner GUANGZHOU CITY UNIV OF TECH