Abstract
This paper proposes a novel coordinated control method of wind farms (WFs) and hydrogen production systems (HPSs). In a grid-connected system where the WF and the HPS are connected to the grid, the WF can supply the power to the grid, producing hydrogen in the HPS. Moreover, the output fluctuation of the WF can be mitigated when the HPS produces hydrogen from the output surplus. The purpose of the grid-connected system is to smooth the WF output fluctuation sufficiently, produce hydrogen constantly, and maintain a high capacity factor in the HPS. The proposed coordinated control achieves the mitigation of the WF output and the high capacity factor in the HPS. The key ideas are 1) utilizing the kinetic energy of wind generators and 2) virtual discharge of the HPS. The fluctuation components of the WF output are compensated by both the WF and the HPS. The proposed coordinated controller enables us to produce hydrogen constantly in the HPS with a low-rated power. The advantage of the proposed coordinated control is verified by a comparative analysis with conventional methods through simulations using real wind data.
Highlights
G where Pσ is the standard deviation of PWF and it is given by t−T (PWF − PFLF)2dt
We demonstrate the comparative analysis for a wind farms (WFs) (500 MW) composed of five wind generator (WG) groups, and each group contains 20 WGs (5 MW/WG), assuming that WGs involved in each group operate under the same wind conditions [11], [40]
This paper proposed a novel coordinated control method for the system composed of a WF and an hydrogen production systems (HPSs)
Summary
The penetration of renewable energy power generation (REPG) into power systems has rapidly grown due to the. The purpose of the grid-connected system is to smooth the WF output sufficiently, produce hydrogen constantly, and maintain a high capacity factor in the HPS. Smoothing control methods using HPS for the REPG, such as the WF and photovoltaics, were proposed in [11] [12], and [16] These methods mitigate the output fluctuation of the WF without using the FC and the ESS. To the best of our knowledge, there exists no method for grid-connected systems composed of the WF and the HPS to smooth the WF output sufficiently and to produce hydrogen constantly, while keeping a high capacity factor in the HPS. The proposed coordinated control achieves mitigation of the WF output fluctuation and high capacity factor in the HPS.
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