Abstract
Wind power causes fluctuations in power systems and introduces issues concerning system stability and power quality because of the lack of controllability of its discontinuous and intermittent resources. This paper presents a coordinated control strategy for solid oxide fuel cells (SOFCs) and superconducting magnetic energy storage (SMES) to match the intermittent wind power generation and compensate for the rapid load changes. An optimal H∞ control method, where the weighting function selection is expressed as an optimization problem, is proposed to mitigate tie-line power fluctuations and the mixed-sensitivity approach is used to deal with the interference suppression. Simulation results show that the proposed method significantly improves the smoothing effect of wind power fluctuations. Compared with the conventional control method, the proposed method has better anti-interference performance in various operating situations.
Highlights
Wind power has been increasingly applied in power systems because of its environmental benefits
The configuration of the simulated microgrid is connected to the utility grid through a transformer and the solid oxide fuel cells (SOFCs) and superconducting magnetic energy storage (SMES) operate in PQ control mode accurately active power control mode in the interconnected condition
This paper has presented the application of SOFC and SMES coordinated control in mitigating the impact of wind power fluctuations in a power system
Summary
Wind power has been increasingly applied in power systems because of its environmental benefits. Wind power fluctuations cause problems in power system operation [1,2,3]. The complementarities between storage and renewable energy sources (RESs) have recently become of particular interest, both in terms of essentially intermittent resources and stability maintenance in electrical power systems [4,5]. Both RESs and storage have different characteristics. The type and capacity of energy storage to be used must be carefully selected
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