Research on Fast Frequency Response Control Strategy of Hydrogen Production Systems

Abstract

With the large-scale integration of intermittent renewable energy generation presented by wind and photovoltaic power, the security and stability of power system operations have been challenged. Therefore, this article proposes a control strategy of a hydrogen production system based on renewable energy power generation to enable the fast frequency response of a grid. Firstly, based on the idea of virtual synchronous control, a fast frequency response control transformation strategy for the grid-connected interface of hydrogen production systems for renewable energy power generation is proposed to provide active power support when the grid frequency is disturbed. Secondly, based on the influence of VSG’s inertia and damping coefficient on the dynamic characteristics of the system, a VSG adaptive control model based on particle swarm optimization is designed. Finally, based on the Matlab/Simulink platform, a grid-connected simulation model of hydrogen production systems for renewable energy power generation is established. The results show that the interface-transformed electrolytic hydrogen production device can actively respond to the frequency disturbances of the power system and participate in primary frequency control, providing active support for the frequency stability of the power system under high-percentage renewable energy generation integration. Moreover, the system with parameter optimization has better fast frequency response control characteristics.

VSG Frequency Response Strategy for Doubly-Fed Wind Farm Considering the Fatigue Load

“…For this reason, future research on distributed control strategies should be carried out to divert the computational pressure from the wind farm central controller. ⃝ ∆P s : d∆P s dt = K(∆ω VSG − ∆ω grid ) According to 1 ⃝ to 7 ⃝, the expressions A, B, C, and E in Equation ( 16) can be obtained as follows:…”

“…As the proportion of wind power in the power system continues to climb, its weak support and low inertia characteristics will inevitably cause certain pressure on the system frequency stability [1]. To satisfy the frequency support requirements of the power system for wind power, a VSG control strategy is introduced into the inverter of wind turbines to slow down the rate of frequency change, increase the lowest point of frequency, and suppress the amplitude of frequency change in the power system [2][3][4].…”