CN-122000885-A - Method, device and equipment for determining generating capacity of vertical axis wind farm

CN122000885ACN 122000885 ACN122000885 ACN 122000885ACN-122000885-A

Abstract

The invention provides a method, a device and equipment for determining the generating capacity of a vertical axis wind power plant, and relates to the technical field of wind power plants. The method comprises the steps of obtaining basic parameters of a vertical axis wind power plant and wind resource distribution parameters of each vertical axis wind power generator unit, determining theoretical generated energy of each vertical axis wind power generator unit according to a power curve and the wind resource distribution parameters, determining a first tail current value corresponding to each vertical axis wind power generator unit according to average wind speed of the vertical axis wind power generator unit in a preset sector and distances between the vertical axis wind power generator unit and the vertical axis wind power generator unit adjacent to the vertical axis wind power generator unit according to the basic parameters and a preset general tail current value standard library, determining target tail current values of each vertical axis wind power generator unit according to wind direction frequency and the first tail current values, and determining target generated energy of the vertical axis wind power plant according to each target tail current value and the theoretical generated energy. According to the scheme, the rapid and accurate assessment of the power generation capacity of the vertical axis wind power plant is realized, and meanwhile, the calculation difficulty is reduced.

Inventors

HAN XIAOLIANG
MA DI
ZHANG PENGYU
YAN ZHIYONG
LI MINGDONG
ZHAO LIN
WANG KAI
YANG YAN
GUO YUNHE

Assignees

内蒙古电力勘测设计院有限责任公司

Dates

Publication Date: 20260508
Application Date: 20260209

Claims (10)

1. A method for determining power generation of a vertical axis wind farm, comprising: obtaining basic parameters of a vertical axis wind generating set in a vertical axis wind farm and wind resource distribution parameters of the current position of each vertical axis wind generating set at the hub height, wherein the wind resource distribution parameters comprise average wind speed, wind direction frequency, scale parameters and shape parameters of a plurality of preset sectors; determining theoretical power generation capacity of each vertical axis wind turbine generator system according to the power curve of the vertical axis wind turbine generator system and the scale parameters and the shape parameters of a plurality of preset sectors in wind resource distribution parameters; According to the basic parameters and a preset general wake value standard library, determining a first wake value corresponding to each vertical axis wind generating set through the average wind speed of each vertical axis wind generating set in a plurality of preset sectors and a first distance between each vertical axis wind generating set and each vertical axis wind generating set adjacent to the average wind speed; Determining a target tail current value of each vertical axis wind turbine generator set according to the wind direction frequency and the first tail current value; And determining the target power generation amount of the vertical axis wind power plant according to the target tail current value and the theoretical power generation amount of each vertical axis wind power generator unit.
2. The method for determining the power generation capacity of a vertical axis wind farm according to claim 1, wherein obtaining wind resource distribution parameters at the hub height of the current position of each vertical axis wind turbine in the vertical axis wind farm comprises: constructing a three-dimensional calculation domain according to basic parameters of a vertical axis wind turbine generator set in a vertical axis wind power plant, and performing wind flow field simulation on the whole domain of the wind power plant to obtain wind acceleration factors of any point in space relative to a preset wind tower position; multiplying the measured time-by-time wind speed data at the preset wind tower with wind acceleration factors of corresponding points to obtain an annual wind speed sequence at the hub height of each vertical axis wind generating set; according to a preset sector division rule, carrying out statistical analysis on the annual wind speed sequence to obtain the average wind speed and wind direction frequency of each preset sector; And fitting a Weibull distribution function according to the annual wind speed sequence, and determining the scale parameter and the shape parameter of each preset sector.
3. The method for determining the power generation capacity of a vertical axis wind farm according to claim 1, wherein determining the theoretical power generation capacity of each vertical axis wind turbine generator set according to the power curve of the vertical axis wind turbine generator set, the scale parameters and the shape parameters of a plurality of preset sectors in the wind resource distribution parameters, comprises: dividing a wind speed range in the wind resource distribution parameters into a plurality of wind speed intervals according to preset intervals; According to the power curve of the vertical axis wind generating set, determining the power value of the vertical axis wind generating set in each wind speed interval; According to the power value of the vertical axis wind generating set in each wind speed interval, the power value is calculated by the formula Determining theoretical power generation of each vertical axis wind generating set ; Wherein, the Representing the duration of the ith wind speed interval; a power value representing the i-th wind speed interval; , the method comprises the steps of expressing the average wind speed of an ith wind speed interval, wherein A represents the scale parameter of a preset sector, and K represents the shape parameter of the preset sector.
4. The method for determining the power generation capacity of a vertical axis wind farm according to claim 1, wherein the preset general wake value standard library is constructed by the following method, including: Based on basic parameters of a vertical axis wind turbine in a vertical axis wind farm, assuming that a single interference source unit is arranged at different preset distances of the single vertical axis wind turbine by taking the current position of the single vertical axis wind turbine as a coordinate origin, and setting a steady incoming flow direction to point from the assumed interference source unit to the position of the single vertical axis wind turbine; Aiming at wind speed values of a plurality of preset sectors at different heights of the hub, calculating predicted wake flow influence values of a single vertical axis wind turbine generator set and an interference source set under different preset distance conditions by taking preset wind speeds as intervals from the cut-in wind speed to the cut-out wind speed of the vertical axis wind turbine generator set; And respectively correlating all the calculated predicted wake impact values with the corresponding preset distance and the corresponding average wind speed to obtain a wake value universal standard library.
5. The method for determining the power generation capacity of a vertical axis wind farm according to claim 1, wherein determining the first tail current value of each vertical axis wind turbine in each preset sector by the average wind speed of each vertical axis wind turbine in a plurality of preset sectors and the first distance between the vertical axis wind turbines adjacent to the average wind speed of each vertical axis wind turbine in the preset sectors according to the basic parameters and the preset general wake value standard library comprises: Judging whether adjacent vertical axis wind turbine generator sets exist in the direction corresponding to each preset sector of each vertical axis wind turbine generator set according to the basic parameters; If the vertical axis wind generating set does not exist, setting a first tail current value corresponding to a current preset sector of the current vertical axis wind generating set to be zero; If the vertical axis wind turbine generator is present, a first distance between the current vertical axis wind turbine generator and the adjacent vertical axis wind turbine generator is measured, whether the first distance is within a preset distance range is judged, when the first distance is within the preset distance range, a first tail current value corresponding to the current preset sector of the current vertical axis wind turbine generator is determined through the average wind speed and the first distance of the current preset sector based on a preset universal tail current value standard library, and when the first distance is not within the preset distance range, the first tail current value corresponding to the current preset sector of the current vertical axis wind turbine generator is set to be zero.
6. The method of determining vertical axis wind farm power generation according to claim 1, wherein determining a target tail current value for each vertical axis wind turbine based on the wind direction frequency and the first tail current value comprises: According to the wind direction frequency and the first tail current value, the method passes through the formula Determining a target tail current value for each vertical axis wind turbine ; Wherein m is the total number of preset sectors of each vertical axis wind turbine generator system; the wind direction frequency corresponding to the e preset sector is represented; And the first tail current value corresponding to the e preset sector is represented.
7. The method for determining the power generation amount of the vertical-axis wind farm according to claim 1, wherein determining the target power generation amount of the vertical-axis wind farm based on the target tail current value and the theoretical power generation amount of each vertical-axis wind turbine group comprises: according to the target tail current value and the theoretical power generation amount of each vertical axis wind generating set, the method passes through the formula Determining the actual power generation of each vertical axis wind generating set, wherein, Representing the actual power generation of the j-th vertical axis wind turbine, Representing the theoretical power generation amount of the j-th vertical axis wind generating set; Representing a target tail current value of the jth vertical axis wind generating set; And accumulating the actual power generation amounts of all the vertical axis wind turbine generator sets in the vertical axis wind power plant to obtain the target power generation amount of the vertical axis wind power plant.
8. A device for determining the amount of power generated by a vertical axis wind farm, comprising: The acquisition module is used for acquiring basic parameters of the vertical axis wind generating sets in the vertical axis wind power plant and wind resource distribution parameters of the current position hub height of each vertical axis wind generating set, wherein the wind resource distribution parameters comprise average wind speed, wind direction frequency, scale parameters and shape parameters of a plurality of preset sectors; The system comprises a data processing module, a basic parameter and a preset general wake value standard library, wherein the data processing module is used for determining the theoretical power generation amount of each vertical axis wind turbine generator according to the power curve of the vertical axis wind turbine generator and the scale parameters and the shape parameters of a plurality of preset sectors in wind resource distribution parameters, determining the first wake value corresponding to each vertical axis wind turbine generator according to the average wind speed of each vertical axis wind turbine generator in the preset sectors and the first distance between the vertical axis wind turbine generator and the vertical axis wind turbine generator, determining the target wake value of each vertical axis wind turbine generator according to the wind direction frequency and the first wake value, and determining the target power generation amount of the vertical axis wind turbine generator according to the target wake value and the theoretical power generation amount of each vertical axis wind turbine generator.
9. A computing device comprising a processor, a memory storing a computer program that, when run on the processor, performs the method of any one of claims 1 to 7.
10. A computer readable storage medium storing instructions which, when run on a computer, cause the computer to perform the method of any one of claims 1 to 7.

Description

Method, device and equipment for determining generating capacity of vertical axis wind farm Technical Field The invention relates to the technical field of wind power plants, in particular to a method, a device and equipment for determining the generated energy of a vertical axis wind power plant. Background The wind turbine generator is an energy conversion device for converting wind energy into electric energy, wind turbines are mainly divided into two types, namely a horizontal axis wind turbine and a vertical axis wind turbine according to different rotation shafts, the vertical axis wind turbine is a wind turbine with a rotation shaft parallel to blades and generally perpendicular to the ground and the rotation shaft perpendicular to the ground, in a vertical axis wind turbine generator, the vertical axis wind turbine generator is mainly used as main power generation equipment, the vertical axis wind turbine generator is required to carry out evaluation calculation of the generated energy of the whole vertical axis wind turbine generator before construction, currently, commercial software for the generated energy calculation of the vertical axis wind turbine generator is not mature, generally, the commercial software is required to have higher expertise by calculation, modeling is carried out according to experience, grids are divided, hydrodynamic calculation boundaries are set, the calculation of a large computer is applied, the workload and difficulty are higher, the rapid generated energy calculation cannot be carried out, meanwhile, the problem of inaccurate calculation results exists, and the existing calculation method has the following defects: When a plurality of adjacent vertical axis wind generating sets are densely built in the same wind power plant, because the distance between the vertical axis wind generating sets, the mutual position relation, wind speed, wind direction and other factors are not considered, the difference between the measured value and the actual value is larger by using the empirical value, the evaluation of the generated energy of the final whole plant is inaccurate, the evaluation of the economic benefit is inaccurate, and thus the investment decision is possibly seriously wrong; Because the single vertical axis wind turbine generator system is not evaluated, the electric quantity of the single vertical axis wind turbine generator system cannot be truly embodied, and the wake situation cannot be effectively evaluated for each vertical axis wind turbine generator system. Disclosure of Invention The invention aims to provide a method, a device and equipment for determining the generating capacity of a vertical axis wind power plant. The method solves the problems of large calculation difficulty, long time and inaccurate evaluation result of the conventional evaluation method of the generating capacity of the vertical axis wind power plant. In order to solve the technical problems, the technical scheme of the invention is as follows: The embodiment of the invention provides a method for determining the generating capacity of a vertical axis wind power plant, which comprises the following steps: obtaining basic parameters of a vertical axis wind generating set in a vertical axis wind farm and wind resource distribution parameters of the current position of each vertical axis wind generating set at the hub height, wherein the wind resource distribution parameters comprise average wind speed, wind direction frequency, scale parameters and shape parameters of a plurality of preset sectors; determining theoretical power generation capacity of each vertical axis wind turbine generator system according to the power curve of the vertical axis wind turbine generator system and the scale parameters and the shape parameters of a plurality of preset sectors in wind resource distribution parameters; According to the basic parameters and a preset general wake value standard library, determining a first wake value corresponding to each vertical axis wind generating set through the average wind speed of each vertical axis wind generating set in a plurality of preset sectors and a first distance between each vertical axis wind generating set and each vertical axis wind generating set adjacent to the average wind speed; Determining a target tail current value of each vertical axis wind turbine generator set according to the wind direction frequency and the first tail current value; And determining the target power generation amount of the vertical axis wind power plant according to the target tail current value and the theoretical power generation amount of each vertical axis wind power generator unit. Optionally, obtaining wind resource distribution parameters at the hub height of each vertical axis wind turbine generator set at the current position in the vertical axis wind farm includes: constructing a three-dimensional calculation domain according to basic parameters of a vertical ax