The proposed primary frequency regulation control model involving wind power, energy storage, and flexible frequency regulation can effectively improve the frequency stability and operational safety of the power system when the penetration rate of
Study under a certain energy storage capacity thermal power unit coupling hybrid energy storage system to participate in a frequency modulation of the optimal capacity configuration scheme, and perform simulation verification using MATLAB/Simulink.
On this basis, this paper puts forward a set of efficient and economical energy storage configuration optimization strategies to meet the demand of power grid frequency modulation and promote the wide application
By promoting the practical application and development of energy storage technology, this paper is helpful to improve the frequency modulation ability of power grid, optimize energy...
In this paper, a two-area grid frequency modulation model containing the thermal power unit (TPU) and the hybrid energy storage system (HESS) transfer functions is innovatively constructed.
On this basis, this paper puts forward a set of efficient and economical energy storage configuration optimization strategies to meet the demand of power grid frequency modulation and promote the wide application of energy storage technology.
This article first introduced the control method based on the signal of ACE (Area Control Error), which is the basic way of secondary frequency modulation and analyzed the features of the basic control mode. Then it zoned the signal of ACE and SOC of the battery energy storage system.
In this paper, the control strategy is designed to use energy storage for primary frequency modulation. At present, the SOC imbalance of internal battery components is common in energy storage batteries.
The proposed primary frequency regulation control model involving wind power, energy storage, and flex-ible frequency regulation can efectively improve frequency stability and operational safety of the power system when the penetration rate of renewable energy is high.
To mitigate the system frequency fluctuations induced by the integration of a large amount of renewable energy sources into the grid, a novel ESS participation strategy for primary frequency regulation considering the State of Charge (SOC) is proposed.
A simulation model of the wind-storage hybrid system is developed in MATLAB/Simulink. The results show that when the rotational speed deviation of any flywheel exceeds the preset limit within the frequency dead band, the system restores SOC consistency.
Li Cuiping et al. used a battery energy storage system to assist in the frequency modulation of thermal power units, significantly improving the frequency modulation effect, smoothing the unit output power and reducing unit wear.
The dynamic frequency modulation model of the whole regional power grid is composed of thermal power units, energy storage systems, nonlinear frequency difference signal decomposition, fire-storage cooperative fuzzy control power distribution, energy storage system output control and other components. Fig. 1.
Under the four control strategies of A, B, C and D, the hybrid energy storage participating in the primary frequency modulation of the unit |Δ fm | is 0.00194 p.u.Hz, excluding the energy storage system when the frequency modulation |Δ fm | is 0.00316 p.u.Hz, compared to a decrease of 37.61 %.
The frequency modulation of thermal power unit has disadvantages such as long response time and slow climbing speed. Battery energy storage has gradually become a research hotspot in power system frequency modulation due to its quick response and flexible regulation.
Reference proposed a simplified model for energy storage participation in primary frequency regulation, validating its effectiveness in enhancing system frequency regulation capability.
In this strategy, part of the power commands are assigned to the energy storage system through fuzzy control, so as to establish the primary frequency modulation scheduling module of the thermal power unit coupling energy storage system, which can ensure the power generation revenue of thermal power units.
