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A method and system for evaluating the complementarity of wind and solar resources in a region

A wind-solar complementary, intra-regional technology, applied in wind power generation, photovoltaic power generation, AC network circuits, etc., can solve the problem of inability to evaluate the complementarity of wind and solar resources, inability to guide the site selection and construction of wind-solar hybrid power stations, and inability to intuitively measure wind-solar complementarity. Resource characteristics, etc.

Active Publication Date: 2021-11-30
YUNNAN POWER GRID
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Problems solved by technology

[0005] As mentioned above, the analysis of wind and wind resources carried out separately, although the overall distribution and historical variability of wind and wind resources can be seen, but it cannot intuitively measure the characteristics of the regional wind and wind complementary resources
At the same time, the current research on the wind-solar hybrid system is mostly based on the optimal matching calculation and system optimization control of a certain wind-solar hybrid system. Advantages and disadvantages of resource complementarity

Method used

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  • A method and system for evaluating the complementarity of wind and solar resources in a region
  • A method and system for evaluating the complementarity of wind and solar resources in a region
  • A method and system for evaluating the complementarity of wind and solar resources in a region

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Embodiment Construction

[0046] It should be noted that, in the case of no conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other.

[0047] Such as figure 1 Shown, concrete method of the present invention is:

[0048] 1) Preprocess the wind speed at the hub height of the grid point and the cumulative ground radiation data, and remove abnormal data values ​​(including abnormal size values, continuous constant values, sudden abnormal points, etc.).

[0049] 2) Standardize the wind speed after pretreatment to obtain the wind speed normalized time series v * : The normalized method is calculated according to the following formula:

[0050]

[0051] where: v t is the data in the original sequence, N is the amount of data in the original sequence, is the average value of the original sequence, s is the standard deviation of the original sequence, and s is calculated according to the following formula: The following is the convention...

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Abstract

The invention provides a method and system for evaluating the complementarity of wind and solar resources in a region. Through the standardized sequence of wind speed and the standardized sequence of ground cumulative radiation, the complementary strength of wind and solar at each grid point in the region is obtained, and the two-dimensional complementary strength of wind and solar in the region is drawn. Atlas to assess the distribution of wind-solar complementary intensity in the region. The invention standardizes the wind and light variables to form new meteorological variables of wind and light resources, integrates the wind and light resources, and fully considers the collaborative variability of wind resources and light resources. Quantitatively calculate and describe such an abstract concept as wind-solar complementarity, and at the same time draw a resource distribution map of wind-solar complementarity through this method. For the evaluation of wind-solar resources in a certain area, the site selection of power stations and the ratio of new energy resources Regulation provides a valuable reference.

Description

technical field [0001] The invention belongs to the field of power generation systems, and in particular relates to a method and system for evaluating the complementarity of wind and solar resources in a region. Background technique [0002] Wind energy and solar energy are both unstable and discontinuous energy sources, and large-scale grid connection will have a non-negligible impact on the grid. Due to the characteristics of the continental monsoon climate in my country, wind energy and solar energy naturally have strong complementarity in terms of time and region—when the sun is strongest during the day, the wind is weak, and at night, the light is weak, but due to the large surface temperature difference and wind energy It has been strengthened; in summer, the sun shines directly on the northern hemisphere, resulting in high sunlight intensity and low monsoon wind, while in winter, although the sunlight intensity is weak, the wind is relatively strong due to the large te...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02J3/38
CPCH02J3/383H02J3/386H02J2203/20Y02E10/56Y02E10/76
Inventor 杨永强李秀峰剡文林何金定赵珍玉王凯蔡建章张敬东蒋燕尹成全吴洋栾毅周彬彬陈凯王有香吴东平
Owner YUNNAN POWER GRID
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