Hybrid energy storage system coordinated control method suitable for new energy power generation side

Abstract

The invention discloses a hybrid energy storage system coordinated control method suitable for a new energy power generation side. The method includes an energy type energy storage system used for adjusting long-time fluctuations are long in fluctuation period and high in capacity, a power type energy storage system used for adjusting short-term fluctuations which are high in fluctuation frequency and large in fluctuation amplitude, and a coordination controller which makes an output control strategy for coordinating a hybrid energy storage system. Through the coordination controller, the hybrid energy storage system coordinated control method provided by the invention realizes effective integration of the energy type energy storage system and the power type energy storage system, arranges output of the hybrid energy storage system according to analysis of a new energy output power fluctuation data change rate, can well smoothen fluctuations of new energy output, reduces the new energy output peak-valley difference, and reduces adverse effects caused by new energy access on a power grid.

Description

technical field [0001] The invention belongs to the field of grid connection and control of new energy power generation, and is used to solve the problem of grid connection and accommodation of new energy. Background technique [0002] In the 21st century, with the increasingly prominent issues of energy, environment and climate change, energy security and environmental protection are the focus of global attention. The development of new energy sources and the promotion of energy strategic transformation have become new trends in world energy development. At present, wind power and solar power are mainly used to generate electricity. The new energy and renewable energy industries, mainly wind power and photovoltaic power generation, are growing rapidly, with mature technologies, modular development conditions and a huge market background. [0003] At present, my country's wind power development as a whole presents the characteristics of large-scale development, long-distanc...

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Problems solved by technology

[0004] However, the deficiencies of new energy sources dominated by wind power and photovoltaic power generation are also obvious. New energy power generation is greatly affected by ambient temperature and weather conditions, and its output has the characteristics of randomness, volatility, and intermittency. In other words, its uncontrollability is relatively large, and its peak-shaving ability is poor, and its connection to the grid will affect the safe and stable operation of the power system

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