Hybrid energy storage configuration method for ''light-storage'' power generation system

A hybrid energy storage and power generation system technology, applied in photovoltaic power generation, circuit devices, system integration technology, etc., can solve problems such as cycle life and other energy storage characteristics differences, achieve good portability, improve fluctuation stabilization effect, and good economy and practical effects

Pending Publication Date: 2021-01-29
TIANJIN UNIV
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Problems solved by technology

Different energy storage methods have different energy storage characteristics such as system cost and cycle life

Method used

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  • Hybrid energy storage configuration method for ''light-storage'' power generation system
  • Hybrid energy storage configuration method for ''light-storage'' power generation system
  • Hybrid energy storage configuration method for ''light-storage'' power generation system

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Embodiment Construction

[0066] In order to make the purpose, technical solutions and advantages of the present invention clearer, the present invention will be discussed in detail below in conjunction with the accompanying drawings and examples:

[0067] This example takes a photovoltaic power station (total installed capacity 850MW, operation period 25 years) as an example, according to figure 1 The simplified flowchart of the specific implementation steps are as follows:

[0068] 101, (S1) According to the historical output data of photovoltaic power plants, the 1-minute-level output process of different typical weather days (sunny, cloudy, rainy, and snowy) is obtained (see figure 2 ); according to the meteorological data in the study area, the time proportion of each typical weather day (sunny, cloudy, rainy, snowy) is obtained through statistics.

[0069] Table 1 The proportion of typical weather days and hours

[0070] typical weather day sunny partly cloudy rain snow day ...

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Abstract

The invention provides a hybrid energy storage configuration method for a ''light storage'' power generation system. The method can be used for carrying out hybrid energy storage planning on a photovoltaic power station and comprises the following steps of S1, arranging output data of the photovoltaic power station and meteorological data of a place where the power station is located, and countinga time proportion of each typical weather day; S2, decomposing the solar photovoltaic output of each typical weather day to obtain a target output curve, a high-frequency fluctuation component and alow-frequency fluctuation component corresponding to each typical weather day; S3, drawing high-frequency and low-frequency fluctuation component histograms and fitting a probability density curve incombination with a daily time proportion of each typical weather; S4, selecting an appropriate hybrid energy storage combination according to the operation period of the photovoltaic power station, the number of energy storage cycles and the hybrid energy storage power determined in the S3; S5, constructing a hybrid energy storage capacity optimization model taking the minimum full life cycle costand the maximum target output satisfaction degree as targets; and S6, solving by adopting a multi-objective optimization algorithm to obtain an optimal hybrid energy storage capacity configuration scheme of the ''light-storage'' power generation system.

Description

technical field [0001] The present invention relates to the field of hybrid energy storage capacity allocation of new energy power generation systems, and more specifically relates to a hybrid energy storage configuration method for "light-storage" power generation systems. Background technique [0002] With the deepening adjustment of my country's energy structure and the increasing demand for energy and emission reduction, clean and low-carbon energy is playing an increasingly important and irreplaceable role on the energy supply side. In recent years, the photovoltaic industry has developed rapidly and the scale of development has increased day by day. This has led to the increasingly serious impact of fluctuations and intermittent characteristics of photovoltaic output on its output stability. This will increase the difficulty of photovoltaic power generation grid connection and cause a large amount of resources waste. Therefore, in order to improve the output stability...

Claims

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Application Information

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IPC IPC(8): H02J3/28H02J3/38G06Q10/04G06Q50/06
CPCH02J3/28H02J3/381G06Q10/04G06Q50/06H02J2203/20H02J2300/22Y04S10/50Y02E10/56Y02E40/70Y02E70/30
Inventor 马超董森练继建庞秀岚
Owner TIANJIN UNIV
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