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A control method and device for storing energy and smoothing output fluctuation of a new energy source

A fluctuating output and new energy technology, applied in the field of new energy power generation and grid connection, can solve the problems of difficult engineering application and complex adjustment and control process, and achieve the effect of improving filtering effect, increasing stability and accuracy

Active Publication Date: 2018-12-28
STATE GRID ZHEJIANG ELECTRIC POWER +4
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Problems solved by technology

[0005] The purpose of the present invention is to provide a control method and device for energy storage to smooth new energy output fluctuations, so as to solve the problem that the existing energy storage system regulation and control method is complex and difficult to realize in engineering applications

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  • A control method and device for storing energy and smoothing output fluctuation of a new energy source

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Embodiment Construction

[0031] The present invention will be described in further detail below in conjunction with the accompanying drawings.

[0032] The invention provides a control method and device for energy storage to smooth new energy output fluctuations, which solves the defect of complicated calculation process in the prior art.

[0033] The overall framework of the control strategy of the present invention is as follows figure 2 As shown, it is mainly divided into two parts, one is the energy storage smoothing control strategy based on the finite field unit impulse response filter (FIR filter) to improve the filtering effect of the system; the other is the simple engineering replacement of the fuzzy control SOC active adjustment control strategy Program. figure 2 Medium P wp is the total output power of wind power and photovoltaic power generation; P ref is the filtered P wp ;P Bref A given reference value for the output of the battery energy storage system; ΔP B is the power adjust...

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Abstract

The invention relates to the field of grid connection of new energy power generation, in particular to a control method and a device for storing energy and smoothing output fluctuation of new energy.The invention adjusts the reference input of the battery energy storage system according to the processing result through the simple and feasible analysis and processing of the battery energy storagesystem, thereby realizing the control and adjustment of the battery energy storage system. The method of the invention can realize the balance control of the SOC of the energy storage system itself, and avoids the difficulty of engineering application caused by the introduction of complex and immature control algorithm in the engineering practice.

Description

technical field [0001] The invention relates to the field of grid connection of new energy power generation, in particular to a control method and device for energy storage to smooth output fluctuations of new energy sources. Background technique [0002] Due to the influence of many factors such as climate and geographical environment, the output of wind power and photovoltaic power generation will show intermittent and fluctuating characteristics. The direct connection of the output power of wind farms and photovoltaic power stations to the grid will bring huge challenges to the stability of the power system, grid frequency and power quality. [0003] The high-frequency components of wind power output power fluctuations can usually be absorbed by the rotor inertia of the generator, and the low-frequency component fluctuations can be absorbed by the system inertia after being connected to the power grid. , needs to be stabilized by configuring an energy storage system. ...

Claims

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Application Information

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IPC IPC(8): H02J3/24H02J3/32
CPCH02J3/24H02J3/32Y02E40/10Y02E70/30
Inventor 张浩王先为马焕安昱杜斌杨美娟吴金龙
Owner STATE GRID ZHEJIANG ELECTRIC POWER
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