US 12,119,659 B2
Hybrid microgrid system for wind power electrical generation
Muhammad Khalid, Dhahran (SA); and Muhammad Maaruf, Dhahran (SA)
Assigned to KING FAHD UNIVERSITY OF PETROLEUM AND MINERALS, Dhahran (SA)
Filed by KING FAHD UNIVERSITY OF PETROLEUM AND MINERALS, Dhahran (SA)
Filed on Mar. 28, 2024, as Appl. No. 18/620,141.
Application 18/620,141 is a continuation of application No. 17/975,120, filed on Oct. 27, 2022, granted, now 12,003,111.
Prior Publication US 2024/0283252 A1, Aug. 22, 2024
This patent is subject to a terminal disclaimer.
Int. Cl. H02J 3/38 (2006.01); H02J 3/32 (2006.01); H02M 3/158 (2006.01)
CPC H02J 3/381 (2013.01) [H02J 3/32 (2013.01); H02M 3/1582 (2013.01); H02J 2300/24 (2020.01); H02J 2300/28 (2020.01)] 7 Claims
OG exemplary drawing
 
1. A hybrid microgrid system (HMS) for wind power electrical generation comprising:
a wind turbine (WT) and an electric generator;
a grid side converter (GSC) configured to output a power to a point of common coupling (PCC);
a DC-link configured to receive a power from the WT and the electric generator and to supply a power to the GSC;
a rechargeable battery configured to exchange a power between the DC-link;
a load configured to receive a power via the PCC;
a utility grid configured to exchange power via the PCC; and
a controller comprising: a processor; a memory; a bus-line; and I/O port,
wherein, the controller is configured to control the HMS by executing a program installed in the memory and in accordance with a global sliding mode control with fractional order terms (GSMCFO) method, and wherein, the program comprises a definition set customized for the HMS and to be referred in applying the GSMCFO method to the HMS,
wherein the definition set comprises: a characteristic element ci to be measured; and equations defining a desired value ci* of the characteristic element ci, a fractional order sliding mode (FOSM) surface (i of the characteristic element ci, and a control law element uicnt of the characteristic element ci, and
wherein the controller is further configured to
monitor the characteristic element ci(t) and a related status of the HMS,
calculate at least one of the equations defined in the definition set based on the characteristic element ci(t) monitored and the status of the HMS monitored, and
control the HMS based on the control law element uicnt(t) calculated,
wherein the equation defining the FOSM surface ζi(t) for the characteristic element ci(t) comprises a fractional time integral of a tracking error ei(t) and a fractional time derivative of the tracking error ei(t), wherein the tracking error ei (t) for the characteristic element ci(t) is defined as,
ei(t)=ci(t)−ci*(t),
wherein the equation defining the control law element uicnt(t) is configured to satisfy a condition

OG Complex Work Unit Math
so far as ζi(t) is not zero.