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Open AccessArticle

Coordinated Frequency Stabilization of Wind Turbine Generators and Energy Storage in Microgrids with High Wind Power Penetration

1
Department of Electrical Engineering and Korea Institute of Energy Research, Deajeon 34129, Korea
2
Department of Electrical Engineering and Chungnam National University, DaeJeon KS015, Korea
*
Author to whom correspondence should be addressed.
Electronics 2019, 8(12), 1390; https://doi.org/10.3390/electronics8121390
Received: 5 November 2019 / Revised: 17 November 2019 / Accepted: 18 November 2019 / Published: 21 November 2019
(This article belongs to the Special Issue Grid-Connected Renewable Energy Sources)
This paper proposes a coordinated control scheme for wind turbine generators (WTGs) and energy storage in microgrids with high wind power penetration. The proposed scheme aimed to reduce the system frequency deviation caused by variations in wind power and loads. To stabilize the frequency, the WTG and energy storage system (ESS) are used for kinetic energy generation and electrical energy storage, respectively. When the WTG contributes excessively to frequency stabilization in the microgrid with a high wind power penetration, the system frequency may fluctuate considerably. Thus, it is necessary to adjust the contribution of a WTG and to share it with other sources. To achieve our objective, we proposed a coordinated control scheme between the WTG and ESS that shares their releasable and absorbable energies. The coordinated control consistently calculated the releasable and absorbable energies of the WTG and ESS and determined weight factors related to the energy ratios. Accordingly, the weight factors improved the ability of providing supporting frequency stabilization of the WTG and ESS by increasing the stored energy utilization. The performance of the scheme was investigated using MATLAB Simulink Electrical. The results show that the proposed coordinated control successfully stabilized the system frequency by calculating the appropriate contributions required from the WTG and ESS.
Keywords: frequency stabilization; coordinated control; wind turbine generator; high-fidelity battery model; releasable and absorbable energy frequency stabilization; coordinated control; wind turbine generator; high-fidelity battery model; releasable and absorbable energy
MDPI and ACS Style

Kang, M.; Yoon, G.; Hong, S.; Park, J.; Kim, J.; Baek, J. Coordinated Frequency Stabilization of Wind Turbine Generators and Energy Storage in Microgrids with High Wind Power Penetration. Electronics 2019, 8, 1390.

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