Research on the Frequency Regulation Characteristics and Control Strategy of Wind Power Generation with Energy Storage Synergy

Abstract

With the high penetration of wind power, the power system has put forward technical requirements for the frequency regulation capability of wind farms. Due to the energy storage system’s fast response and flexible control characteristics, the synergistic participation of wind power and energy storage in frequency regulation is valuable for research. This paper established a frequency characteristic model of a power system, including wind power and energy storage, and analyzed the influence of different frequency regulation methods on system stability. Based on the established model, a fuzzy PID-based energy management strategy was designed for different disturbance scenarios, which offered the advantages of simple parameter design and easy online operation of the project. This paper used a case based on the actual parameters for verification. The energy storage, rated at 10% of the wind farm’s rated power, provided 56% frequency drop suppression and 89% frequency fluctuation rate suppression, according to the proposed model in this paper. The proposed fuzzy PID control strategy achieved adaptive control of the controller parameters under strong disturbances and was able to provide an additional frequency rejection capability of 10–25%.

Research on a power smoothing control strategy for energy storage hydraulic wind turbines

“…Although the motor speed is constant (1500 r/min) in the grid-connected state, the hydraulic motor output torque fluctuates. The F I G U R E 4 An energy storage hydraulic wind turbine principle in Li et al 31 and Li 32 F I G U R E 5 Schematic diagram of an energy storage hydraulic wind turbine displacement of the HESS variable displacement pump motor is adjusted by detecting the output torque fluctuation of the motor. Therefore, HESS charging or discharging is controlled to output compensating torque to realize a power stable output.…”

“…A new type of compressed air energy storage system modeling and control method for HWTs was proposed in Li et al 31 and Li 32 and a nonlinear controller was designed to realize maximum power point tracking (MPPT) and to absorb the power fluctuations in hydraulic pipes. The proposed ESHWT as shown in Figure 4 is inconsistent with the ESHWT in this paper.…”

Research on Combined Frequency Regulation Control Method of Wind Storage with Storage System Optimized Intervals Considered

“…With the rapid development of energy storage, energy storage participates in the system's frequency regulation, and it provides a solid guarantee for the safe and stable operation of the system [22]. e virtual synchronous control of energy storage simulates the characteristics of traditional generators by adding virtual inertia and virtual droop coefficient to the energy storage control strategy [23].…”

Multi-Energy Cooperative Primary Frequency Regulation Analysis of a Hybrid Plant Station for Wind Power and Hydrogen Production Based on Ensemble Empirical-Mode Decomposition Algorithm

“…The DC-DC converter connects the energy storage device to the wind turbine DC bus. References [17,18] examine the collaborative wind turbine energy storage device's frequency regulation features and suggest a wind storage combination control technique for frequency regulation. Reference [19] suggests using the energy storage device in conjunction with the extra control of the wind turbines to aid in the recovery of the system frequency.…”