A Coordinated Control Method for Wind Storage Isolated Grid Power Supply System Based on Flexible Coordination Factor

Abstract

The invention discloses a coordinated control method for an isolated wind storage grid system based on a flexible coordination factor, and belongs to the technical field of power grid operation and control. Its characteristics include the following steps: ① Obtain the operating parameters of the wind storage isolated grid power supply system; ② establish a coordinated control mechanism for the wind storage isolated grid power supply system; realize the upper coordinated control agent and the lower unit decentralized control agent through direct and indirect actions ③ Calculate the flexible coordination factor of the power balance of the wind storage isolated grid power supply system; ④ The upper layer coordination control agent distributes the flexible coordination factor to the lower energy storage unit decentralized control agent; ⑤ The energy storage inverter implements power control. The coordinated control method of the wind storage isolated grid power supply system based on the flexible coordination factor adopted in the present invention can realize the coordinated control of each unit in the wind storage isolated grid system, and ensure the stability of the output voltage and frequency of the wind storage isolated grid system. The stable operation of the isolated grid storage system provides technical basis and practical methods.

Description

technical field [0001] The invention relates to a coordinated control method for a wind storage isolated grid power supply system, in particular to a coordinated control method for a wind storage isolated grid power supply system based on a flexible coordination factor, and belongs to the technical field of power grid operation and control. Background technique [0002] Among the distributed energy generation, wind power generation is the project with the most mature technology, the most development conditions and good development prospects. However, limited by the capacity of the large power grid, problems such as "difficulty in grid connection" and "wind abandonment" in the process of large-scale access to the power grid have become major problems restricting the development of wind power. In response to the above-mentioned problems of wind power grid connection, experts at home and abroad have proposed wind-storage combined power generation technology. With the reduction...

AI Technical Summary

Problems solved by technology

The core problem of the stable operation of the wind-storage isolated power supply system is: after losing the support of the large power grid, under various external disturbance conditions, the system must rely on its own adjustment ability to restore a stable operating state

The complexity of this control lies in that, on the one hand, the control strategy must adapt to changes in various operating conditions, such as energy storage status, fan output changes, system load changes, etc., and different operating conditions require power characteristics provided by energy storage control. are also different, and their characteristics are also related to the operating status of the wind storage system

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