A New Control Strategy to Integrate Flow Batteries into AC Micro-Grids with High Wind Power Penetration

SUVIRE, G.O.; ONTIVEROS, L.J.; MERCADO, P.E.

Redox: Principles and Advanced Applications

INTECH

Lugar: Rijeka; Año: 2017; p. 83 - 102

The penetration of wind generation into ac micro-grids (MGs) has beenincreasing in recent years. Wind generation is uncontrollable, variable innature, and uncertain. If the penetration level is high, the random variationsof the wind power generation could cause problems for MGs to maintain thenominal system frequency. A typical solution is to employ energy storagesystems (ESS) into the MG in order to compensate the wind power fluctuations. Inthis chapter, the use of a vanadium redox flow battery (VRFB) coupled with aPower Conditioning System (PCS) is suggested to enhance the frequency stabilityof a MG with high wind power penetration. A new control system is developed forthe PCS/VRFB. The control system performs the load leveling of the windgeneration, and carries out the primary and secondary frequency control of theMG. Dynamic simulations of the proposed device are performed, and demonstratethat the new control system improves the transient responses of the PCS/VRFBand the MG, during minor and/or severe disturbances.