Super-Twisting Algorithm-Based Virtual Synchronous Generator in Inverter Interfaced Distributed Generation (IIDG)

Abstract

The significant proliferation of renewable resources, primarily inverter interfaced distributed generation (IIDG) in the utility grid, leads to a dearth of overall inertia. Subsequently, the system illustrates more frequency nadir and a steeper frequency response. This may degrade the dynamic frequency stability of the overall system. Further, virtual inertia has been synthetically developed in IIDG, which is known as a virtual synchronous generator (VSG). In this work, a novel STO-STC-based controller has been developed, which offers flexible inertia following system disturbance. The controller is based on the super-twisting algorithm (STA), which is a further advancement in the conventional sliding mode control (SMC), and has been incorporated in the control loop of the VSG. In this scheme, two steps have been implemented, where the first one is to categorize all states of the system using a super-twisting observer (STO) and further, it is required to converge essential states very quickly, exploiting a super-twisting controller (STC). Thus, the STO-STC controller reveals a finite-time convergence to the numerous frequency disturbances, based on various case studies. The performance of the controller has been examined in the MATLAB environment with time–domain results that corroborate the satisfactory performance of the STO-STC scheme and that illustrate eminence over the state of the art.

Direct Power Control for Three-Level Multifunctional Voltage Source Inverter of PV Systems Using a Simplified Super-Twisting Algorithm

“…Under steady-state conditions, with an adequate control law, the sliding mod control forces the state of the system to meet the above conditions, i.e., 𝑆 = 0, 𝑆 ̇= 0 [60 Usually, SMC law needs the measurement of the time derivative of the sliding functio and provides a discontinuous form, which is sometimes inconvenient because of th chattering phenomenon [61]. The STA control represents an alternative to overcome th constraint.…”

“…S = 0 [60]. Usually, SMC law needs the measurement of the time derivative of the sliding function and provides a discontinuous form, which is sometimes inconvenient because of the chattering phenomenon [61]. The STA control represents an alternative to overcome this constraint.…”

Sliding Mode Regulation of a Boost Circuit for DC-Biased Sinusoidal Power Conversion

“…Hence, it is assumed that z 1 = z 2 = e = 0, yielding Equation (15). Now, we introduce the sliding function σ that stabilizes the unstable residual dynamics, as well as the super-twisting controller [29], as follows:…”

Frequency Stability Prediction of Power Systems Using Vision Transformer and Copula Entropy

“…However, the inertia that maintains the system frequency stability is declining because synchronous generators are being replaced by nonsynchronous generators (renewable resources) [ 6 ]. To arrest and stabilize frequency volatility in renewable-energy-penetrated power systems, it is essential to accurately and quickly predict system frequency stability, which helps system planners and dispatchers to determine the corresponding control measures in advance, such as under frequency load shedding [ 7 , 8 ], frequency regulation using renewable-power production units [ 9 ], frequency regulation using loads [ 10 ], and frequency regulation using storage devices [ 11 ].…”