Nonsingular terminal sliding mode controller for voltage and current control of an islanded microgrid

An Efficient and Robust Current Control for Polymer Electrolyte Membrane Fuel Cell Power System

“…The equivalent term u eq is obtained by setting a sliding surface s and is finally achieved by establishingṡ = 0 [40]. The sliding surface given in Equation ( 13) is proposed; where the parameters α, λ, p and q are constants that satisfy the following condition: α > 0, λ > 0, p > 0, q > 0, 1 < p/q < 2 [42][43][44].…”

Control strategies for permanent magnet synchronous generator‐based wind turbine with independent grid‐forming capability in stand‐alone operation mode

“…In the stand-alone microgrids with high renewable penetration, existing studies [13][14][15][16] adopted the classical droop-based control methods for enhancing the frequency and voltage stability. Moreover, previous studies [17][18][19] also proposed effective nonlinear controllers suitable for stand-alone microgrids. However, the coordination designs between RSC and GSC of PMSG-based WT were not given in References 17-19.…”

“…The researchers continued to explore the possibility of PMSG-based WT integrating into stand-alone microgrids in References 20 and 21. Unfortunately, in above so-called stand-alone microgrids, [13][14][15][16][17][18][19][20][21] there still exist external power supplies or the energy storage system (ESS) 22,23 to build the robust PCC voltage. Thus, the above control strategies [13][14][15][16][17][18][19][20][21][22][23] still implemented typical PLL-dependent grid-following 24 controls, which cannot avoid PLL-associated instability issues [6][7][8] and cannot build the AC voltage independently in SAOM.…”

“…1. The previous studies [10][11][12][13][14][15][16][17][18][19][20][21] in stand-alone microgrids mainly focus on the PLL-based controls for WTs, which still require the external grid-forming power supplies. Few papers discussed how to make PLL-free control schemes for stand-alone VSWTs to construct AC voltage independently in microgrid without any external power sources.…”

A Robust Control Method for Damping and Tracking of Secondary Network Voltage of a PV Based Hybrid AC/DC Microgrid

“…), heterogeneously combined with a number of distributed generation (DG) units, point of common-coupling, loads and renewable power sources (RPS) (Xia et al, 2017). The idea of MG has become increasingly popular as it demands low cost in case of power generation from RPS, enhances local reliability, compensates feeder losses, and provides voltage support/voltage sag correction (Badal et al, 2019;Armin et al, 2020;Rizi and Eliasi, 2020). Several types of MG like AC MG, DC MG and hybrid source of AC/DC MG can be found in power system (Sarkar et al, 2018b;Toghani Holari et al, 2020).…”