Power Grid Emergency Frequency Control Method Based on Synergistic Cooperation Between Submerged Arc Furnace and Energy Storage

The fluctuation of high penetration of new energy has brought great challenges to the frequency stability control of power grid. In order to solve this difficulty of frequency stability control in the future, the demand response based on high energy consumption industrial load has great prospects. This paper proposes an emergency frequency control method for power grid based on the coordination of submerged arc furnace load and energy storage. Firstly, the system frequency deviation is introduced into the load of submerged arc furnace and energy storage so that their active power can quickly respond to frequency variation to provide fast power support for the power grid and ensure the system frequency stability. Secondly, considering the state constraints of the submerged arc furnace and the energy storage and caculating the adjustable capacity, the ratio of the adjustable capacity is used to determine the active power regulation of each when participating in the emergency frequency control of the power grid. Finally, IEEE 3-generators 9-buses system is built on RTDS platform to verify effectiveness of the proposed control method.