Geometric manifold control of power electronics in Dc microgrids

Digital memory look-up based implementation of sliding mode control for dc–dc converters

“…Switching converters form a variable structure system and thus sliding-mode control is an effective and simpler technique (Alvarez-Ramirez, Espinosa-Perez, & Noriega-Pineda, 2001;Sira-Ramirez, 1989) than other robust control schemes which are computationally intensive (Guldemir, 2011;Shtessel, Zinober, & Shkolnikov, 2002). Previous work has been done on the development of sliding-mode control strategies in power electronics, which drive the system states to some reference (Banerjee & Weaver, 2012& Weaver, , 2014Cid-Pastor et al, 2013;Guldemir, 2005;He & Luo, 2006;Mattavelli et al, 1995). The use of digital control in switching power converters has increased due to the decreased cost and increased computational capability of digital ICs (König, Gregorĉiĉ, & Jakubek, 2013;Liu & Jia, 2010;Marwali & Keyhani, 2004).…”

Multidimensional Optimal Droop Control for Wind Resources in Dc Microgrids

“…An alternative optimal droop control method has been proposed by Rokrok and Golshan, where the voltage reference for each source is drooped as a function of the active and reactive power outputs of that source [56]. In dc microgrids, optimal control techniques have been applied to predetermine optimal switching surfaces for various transient events [57], as well as to control the operation of a battery energy storage system connected with the system [58].…”

Local Digital Control of Power Electronic Converters in a Dc Microgrid Based on a-Priori Derivation of Switching Surfaces

“…These models of dc-dc converters in the energy-impedance or energy-conductance domain have been done keeping in mind that a power network uses bus admittance or bus conductance matrices and making a conductance or admittance system state is beneficial [21]. The selection of the states need to be made even more general by considering the power flowing into different sections of the power network and the stored energies in the converters to be the system states [1]. Conversion to other states as per the requirement of the system design is possible from these power and energy states.…”

“…Also, dc microgrids do not require any synchronization [54]. Usage of power electronics in microgrids enable the capability of using the stored energy, even bus capacitance, to mitigate system transients [1].…”

“…where x represents the converter states and f (x) is the deviation of the states from the derived geometric surface [1]. The switching control law is therefore given by [72,73]…”