Abstract
As a form of energy storage with high power and efficiency, a flywheel energy storage system performs well in the primary frequency modulation of a power grid. In this study, a three-phase permanent magnet synchronous motor was used as the drive motor of the system, and a simulation study on the control strategy of a flywheel energy storage system was conducted based on the primary frequency modulation of wind power. The speed and current double closed-loop control strategy was used in the system start-up phase, and the power and current double-closed-loop control strategy were used in the power compensation phase. The model reference adaptive control was used to accurately estimate the speed and position of the rotor. The system compensates for the wind power output by using a wind turbine in real-time and conducting simulation experiments to verify the feasibility of the charge and discharge control strategy. At the same time, it can be verified that the flywheel energy storage system has a beneficial effect on wind power frequency modulation.
Highlights
Under General Secretary Xi Jinping’s important instructions to reach peak carbon dioxide emissions by 2030 and achieve carbon neutrality before 2060, many provinces inChina have successively introduced new energy configuration storage plans
The flywheel energy storage system (FESS) is usually composed of a drive motor, flywheel rotor, support bearing, and control system
It can be seen that the output power of the wind turbine and the FESS forms a complementary mode and discharges stable power to the grid
Summary
Under General Secretary Xi Jinping’s important instructions to reach peak carbon dioxide emissions by 2030 and achieve carbon neutrality before 2060, many provinces in. It is estimated that the installed capacity of wind power and solar power will reach 1.2 billion kilowatts or more in 2030, which will surpass coal power and become the main portion of installed capacity [1] Whether it is the large-scale and intensive development of centralized new energy or the nearby consumption of distributed new energy, the support of energy storage technology is an inseparable component. The flywheel energy storage system (FESS) has a large capacity, high energy conversion rate, high instantaneous power, and high-frequency charge and discharge characteristics. It has broad application prospects in grid frequency modulation, uninterrupted power supply, and kinetic energy recovery and reuse. The corresponding charging and discharging control strategy was proposed, and a simulation experiment of the FESS for wind power compensation was carried out
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