Abstract
Due to a larger intervention application of the wind-photovolatic new energy generation system, the stability and reliability of the main power grid will be greatly affected. One of the most effective methods to improve the quality of the power grid is to add the energy storage euipment. Based in this, according to the energy storage demand of short term and high frequency in the power grid, this paper focuses on a kind of power regulation system based on the flywheel energy storage array. Owing to the advantages of fast response and frequent charge-discharge characteristics, the flywheel system can be used to support and regulate the power grid through the process of the frequency and amplitude modulation. By using the flywheel system, the stability of the power grid can be improved effectively. In this paper, the proposed power regulation system is firstly introduced as well as the working principle of the flywheel energy storage array. On this basis, the key performance indices of the flywheel array are given, and then a kind of charge-discharge test process is provided. Finally, the power experiments by using the actual flywheel system is developed, including the power absorption and feedback electric generation. The experiment results show that the response characteristics, capacity and power of the designed flywheel array can meet the needs of power regulation system applied in the power grid.
Highlights
In the traditional field of the power grid system, coal-based thermal power generation is the main electricity source with a larger AGC frequency modulation demand
The flywheel array is configured in a one-and-many mode, while each flywheel unit is equipped with an independent flywheel converter and each flywheel converter is equipped with an independent flywheel management system (FMS)
A high-power magnetically suspended flywheel array system developed by Beijing Honghui International Energy Technology Development Co., Ltd. is taken as the experimental object to verify the power regulation system performance
Summary
In the traditional field of the power grid system, coal-based thermal power generation is the main electricity source with a larger AGC frequency modulation demand. The flywheel energy storage system will be connected to the grid-connected portal of the new energy generation in real. Due to the rapidity and frequent charge-discharge process of the flywheel, the real-time power regulation and support are carried out to improve the stability and reliabilty of the power grid by cutting peak and filling valley. Few works have been presented to develop the design and application of the flywheel array in the power grid field. The composition and working principle of the flywheel array are introduced, the power regulation system applied in the power grid is designed. The real experimental system are developed based on two groups of 50kWh flywheel array and some experiments are carried out to indicate the effectiveness of the proposed system. Working Principle of the Magnetically Suspended Flywheel Energy Storage System
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