A method for smoothing output of photovoltaic power station

A technology for smoothing output and photovoltaic power plants, which is applied in the field of electric power and can solve problems such as smoothing the output curve delay.

Active Publication Date: 2018-06-29
STATE GRID CORP OF CHINA +2
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Problems solved by technology

[0010] The main purpose of the embodiments of the present invention is to provide a method for smoothing the output of photovoltaic power plants to solve the problem of time delay in the smooth output curve obtained by using the first-order low-pass filter algorithm to stabilize the power fluctuations of photovoltaic power plants in the prior art

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  • A method for smoothing output of photovoltaic power station
  • A method for smoothing output of photovoltaic power station
  • A method for smoothing output of photovoltaic power station

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Embodiment Construction

[0045] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0046] The present invention provides a method for smooth output of photovoltaic power plants, such as image 3 As shown, the method includes:

[0047] Step S1, obtaining a data set composed of predicted power values ​​of photovoltaic power plants.

[0048] Specifically, this step can obtain the predicted power value from the power prediction system SCADA of the photovoltaic power station, that is, obtain the output power value of the photovoltaic power stati...

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Abstract

The present invention provides a method for smoothing output of a photovoltaic power station, comprising: acquiring a data set consisting of predicted power values ​​of a photovoltaic power station; using a polynomial fitting algorithm to fit the data set to obtain an ideal smooth output formula; according to the ideal smooth output The formula calculates the ideal smooth output value; according to the magnitude relationship between the ideal smooth output value and the predicted power value of the photovoltaic power station, the actual smooth output value is determined. The present invention performs polynomial fitting on the predicted value of photovoltaic power station power in the entire planned output interval, so that the finally obtained actual smooth output curve will not lag and delay. The present invention has a more optimized smooth output effect.

Description

technical field [0001] The invention relates to the field of electric power technology, in particular to a method for smoothing output of a photovoltaic power station. Background technique [0002] Photovoltaic power generation is currently a relatively mature technology that utilizes renewable clean energy for power generation. However, due to the randomness and volatility of solar energy resources, it brings a series of impacts on the power grid. The degree of power fluctuation directly affects the original power flow distribution of the power grid. When the penetration rate of photovoltaic power generation is at a high level, the volatility and randomness will have a huge impact on the operation of the power grid. figure 1 It is a schematic diagram of the photovoltaic power station system. Multiple photovoltaic power generation units are connected to the same busbar, and then connected to the power system through the main transformer of the photovoltaic power station. In...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02J3/24
Inventor 任巍曦柳玉刁嘉马步云岳巍澎李智宗瑾张扬帆寇建翟化欣史学伟
Owner STATE GRID CORP OF CHINA
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