Hybrid energy storage system based on fuzzy algorithm and DSP (Digital Signal Processor) and power smoothing method

Abstract

The invention relates to a hybrid energy storage system based on a fuzzy algorithm and DSP (Digital Signal Processor) control. The hybrid energy storage system is characterized in that the system comprises a main circuit unit, a synchronous signal detection circuit unit and a DSP controller. A power smoothing method of the hybrid energy storage system comprises the steps of synchronous signal detection, algorithm writing, pulse control and energy storage, and feedback. The hybrid energy storage system and the power smoothing method thereof have the advantages that the structure is simple; the power fluctuation under different situations can be stabilized; the phenomenon of over-charging or over-discharging can be avoided; the processing speed is fast and the sensitivity is high.

Description

(1) Technical field: [0001] The invention belongs to the technical field of distributed energy accessing a grid in a smart grid, in particular to a hybrid energy storage system and a power smoothing method based on a fuzzy algorithm and a DSP (Digital Signal Processor). (2) Background technology: [0002] With the decrease of traditional energy sources, a new research hotspot has been formed in the power system - Distributed Generation Technology. Distributed generation equipment often brings many problems when connected to the grid. By adding energy storage devices, it can reduce The impact of wind farm grid connection on system stability is of great significance to improving power quality. Wind power generation is the power generation technology with the most mature technology, the most large-scale development and commercial development prospects in the development and utilization of renewable energy in the world today. [0003] However, as an intermittent energy source, ...

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Problems solved by technology

[0003] However, as an intermittent energy source, the direct reason why wind power cannot be used by the first-generation power grid is that it cannot continuously output power; Large-scale grid-connected power generation is still not possible, and it can only be consumed locally or used in places that do not require high power quality; however, the construction of the second-generation power grid has started, and large-scale grid-connected wind power generation is the general trend, so wind power smoothing The study of stable output is particularly important

[0004] At present, a variety of methods have been proposed to smooth the output power fluctuations of wind farms; some methods directly adjust the operating state of wind turbines to smooth their output power, but this method has limited power adjustment capabilities; Combining variable pitch and variable speed control to smooth generator output active power, but this method cannot utilize wind energy with maximum efficiency

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