Combined power generation smooth output method of photovoltaic power station and energy storage system

A technology for smooth output and combined power generation, which is applied in the electric power field and can solve problems such as output smooth curve delay

Active Publication Date: 2016-06-15
STATE GRID CORP OF CHINA +1
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  • Claims
  • Application Information

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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 joint power generation of photovoltaic power plants and energy storage systems, so as to solve

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  • Combined power generation smooth output method of photovoltaic power station and energy storage system
  • Combined power generation smooth output method of photovoltaic power station and energy storage system
  • Combined power generation smooth output method of photovoltaic power station and energy storage system

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Embodiment Construction

[0048] 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.

[0049] The present invention provides a method for smoothing joint power generation of photovoltaic power plants and energy storage systems, such as image 3 As shown, the method includes:

[0050] Step S1, obtaining a data set composed of power prediction values ​​of photovoltaic power plants.

[0051] Specifically, in this step, the power prediction value can be obtained from the power prediction system SCADA of the photovoltaic power station, that is, the ...

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Abstract

The invention provides a combined power generation smooth output method of a photovoltaic power station and an energy storage system. The method comprises the following steps of acquiring a data set comprising power forecast values of the photovoltaic power station; fitting the data set by using a polynomial fitting algorithm to obtain a combined power generation smooth output formula; calculating a combined power generation smooth output value according to the combined power generation smooth output formula; and determining an output mode and a power output value of the energy storage system according to the size relation between the combined power generation smooth output value and the power forecast values of the photovoltaic power station and the absolute value of a different value. According to the method, the output value of smooth power fluctuation of the photovoltaic power station is determined by a polynomial fitting method, the whole planning output section can be considered, the output value after optimization is more moderate, and the inertia time of a first-order lowpass filtering method is reduced. Compared with the prior art, the method provided by the embodiment of the invention has the advantages of more optimal smooth output effect.

Description

technical field [0001] The present invention relates to the field of electric power technology, in particular to a method for smoothing output of combined power generation of a photovoltaic power station and an energy storage system. Background technique [0002] Solar energy is a clean and renewable energy, but there are problems of randomness and volatility, which bring a series of impacts to 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 original operation mode of the power grid. In order to reduce this impact, large-scale energy storage systems can be configured in photovoltaic power plants for joint operation. figure 1 It is a schematic diagram of a photovoltaic power station and large-scale energy storage combined power generation system. Multiple photovolta...

Claims

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Application Information

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IPC IPC(8): H02J3/28
CPCY02E10/56Y02E70/30
Inventor 柳玉李娜袁绍军陈豪李智宗瑾张扬帆龙彦董建明
Owner STATE GRID CORP OF CHINA
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