Reliability improvement of wind power frequency modulation based on look‐ahead control strategy and stage of charge optimization of energy storage

2021 ◽  
Author(s):  
Chen Changqing ◽  
Li Xinran ◽  
Liu Xiaolong ◽  
Yang Yang
Keyword(s):  
Energy Storage ◽  
Wind Power ◽  
Frequency Modulation ◽  
Control Strategy ◽  
Reliability Improvement ◽  
Look Ahead ◽  
Power Frequency

scholarly journals Adaptive Droop Coefficient and SOC Equalization-Based Primary Frequency Modulation Control Strategy of Energy Storage

Electronics ◽  
2021 ◽  
Vol 10 (21) ◽  
pp. 2645
Author(s):  
Gaojun Meng ◽  
Yang Lu ◽  
Haitao Liu ◽  
Yuan Ye ◽  
Yukun Sun ◽  
...  
Keyword(s):  
Energy Storage ◽  
Frequency Modulation ◽  
Control Strategy ◽  
Simulation Analysis ◽  
Power Grid ◽  
Frequency Regulation ◽  
Storage Battery ◽  
Load Disturbance ◽  
Modulation Control ◽  
Primary Frequency

In order to efficiently use energy storage resources while meeting the power grid primary frequency modulation requirements, an adaptive droop coefficient and SOC balance-based primary frequency modulation control strategy for energy storage is proposed. Taking the SOC of energy storage battery as the control quantity, the depth of energy storage output is adaptively adjusted to prevent the saturation or exhaustion of energy storage SOC. The balanced control strategy is introduced to realize the rational utilization of resources and the fast balance of SOC in the process of primary frequency modulation of energy storage battery under different charge states. Then, four evaluation indexes are proposed to evaluate the effect of primary frequency modulation and SOC maintenance. Taking a regional power grid as an example, a simulation analysis is carried out under step load disturbance and continuous load disturbance. According to the simulation results, the proposed control strategy is effective in power system frequency regulation and battery SOC maintenance.

scholarly journals Configuration Method and Multi-Functional Strategy for Embedding Energy Storage into Wind Turbine

Energies ◽  
2021 ◽  
Vol 14 (17) ◽  
pp. 5354
Author(s):  
Changqing Chen ◽  
Xinran Li
Keyword(s):  
Energy Storage ◽  
Power Consumption ◽  
Wind Turbine ◽  
Wind Power ◽  
Frequency Modulation ◽  
Synchronous Generator ◽  
Structure Model ◽  
Functional Strategy ◽  
Equal Capacity ◽  
Additional Value

This paper proposes a Configuration method for energy storage (ES), in which the ES inertia of ES is equal to an equal capacity synchronous generator. The purpose is to enhance the frequency modulation capability of double-fed induction generator (DFIG) and wind power consumption. Through the proposed method, the system inertia can remain unchanged after the DFIGs replacing the conventional turbines. During the DFIG rotor speed recovery, the ES releases energy to compensate for sudden changes in active power. On this basis, the DFIG and ES structure model is created, and the ES control strategy is optimized, thereby effectively improving the DFIG frequency modulation capability. Besides, in the non-frequency modulation period, the ES is used to suppress wind power fluctuations, thereby improving system wind power consumption and ES utilization. Simulation results indicate, in the ES-embedded wind turbine structure model, the combination of the ES Configuration method and multi-functional strategy significantly improves the frequency modulation ability and anti-interference performance of a single DFIG. Moreover, the wind power consumption and ES utilization are improved, and the ES achieves additional value.

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