Power station energy storage microgrid system

Abstract

The invention discloses a power station energy storage microgrid system. The system comprises a distributed power generation device, an energy storage device, a DC load module, an AC load module, a conversion device, a microgrid control module, a microgrid protection module and a network communication module, wherein the distributed power generation device is connected with the energy storage device through the conversion device, the distributed power generation device is connected with the AC load module through the conversion device, and the distributed power generation device is connected with the DC load module. According to the power station energy storage microgrid system, an AC-DC hybrid microgrid is adopted, wind, light, diesel and storage are comprehensively applied, the diesel generating operation time is shortened as much as possible through optimal configuration of an energy storage system, the renewable energy source utilization rate and the battery service life are maximized, the renewable energy source is comprehensively considered to be utilized to the maximum extent in the aspect of energy scheduling to reduce diesel power generation, and meanwhile, the battery service life is maximized by considering the use characteristics of a storage battery.

Description

technical field [0001] The invention relates to a microgrid system, in particular to a power station energy storage microgrid system, which belongs to the technical field of power station microgrids. Background technique [0002] With the construction of a strong smart grid, the development of the distribution network plays a pivotal role in the smart grid. The distribution network is widely distributed, complex in composition, and has a wide range of influences. Its power supply capacity, power supply reliability, and power supply quality have a huge impact on the economy and society. Due to the weak grid structure at the end of the distribution network in rural areas, mountainous areas, and islands, there are often problems of insufficient power supply capacity, poor power quality, and low power supply reliability caused by seasonal and periodical load fluctuations. Take Fujian Province on the southeast coast of China as an example. There are a large number of islands alo...

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Problems solved by technology

[0004] When the micro-grid distributed power supply is an energy storage system, due to the limited power of the energy storage system, it is impossible to achieve long-term (such as tens of hours) island operation after a failure of the large power grid, and the existing technology cannot simultaneously realize it in the micro-grid. Rational configuration and application of megawatt wind turbines and solar photovoltaic power generation devices

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