This paper presents a new multi-objective control strategy for inverter-interfaced distributed generation (IIDG) to ensure its safe and continuous operation under unbalanced voltage sags. The proposed can effectively improve the low ride through (LVRT) capability, reduce active power oscillations, limit overcurrent simultaneously, which are marked as most important objectives of IIDG during adv...

With the continuously increasing penetration of networked microgrids (MGs) on local utility grid (UG), MGs face challenge to avoid system fault currents during low-voltage ride-through (LVRT). To solve this challenge, an active current limitation (AFCL) method is proposed with three parts: 1) a novel phase angle adjustment (PAA) strategy conducted relieve impact output current; 2) injection (CI...

Due to the high penetration of grid-connected photovoltaic (GCPV) systems, network operators are regularly updating grid codes ensure that operation GCPV systems will assist in maintaining stability. Among these, low-voltage-ride-through (LVRT) is an important attribute PV inverters allows them remain connected with during short-term disturbances voltage. Hence, equipped control strategies secu...

Traditionally, industrial countries have generated most of their electricity in large centralised facilities, such as fossil fuel (coal, gas), nuclear, large solar power plants or hydropower plants. Although these plants have excellent economies of scale, they usually transmit electricity over long distances and negatively affect the environment. More recently, a surge in the concerns over clim...

This paper proposes an isolated buck-boost topology and control strategy for the photovoltaic (PV) medium-voltage DC (MVDC) converter with low-voltage ride through (LVRT) capability. The proposed operates on either boost or buck mode by only controlling active semiconductors side. Based this topology, (MV) dc–dc module is able to be developed reduce number of modules increase power density in c...

For doubly-fed induction generator (DFIG)-based wind turbines (WTs), various advanced control schemes have been proposed to achieve the low voltage ride through (LVRT) capability, whose parameters design is significantly reliant on rotor electromotive force (EMF) of DFIG-based WTs. However, influence current EMF usually ignored in existing studies, which cannot fully reflect transient character...

Overvoltage and overcurrent resulting from various faults cause instability in Doubly Fed Induction Generator (DFIG)-based wind turbines connected to a grid. The grid code requirement must be met during minimize the effect of these problems. Low Voltage Ride Through (LVRT) capability is used meet requirement. It important use coordinate control for transient states LVRT capability. This study a...

For grid-connected DFIG-based wind turbine, Fault Ride Through (FRT) or Low Voltage (LVRT) capability is vital problem that need to be improved. This paper proposes an Active Disturbance Rejection Control (ADRC) strategy applied Doubly Fed Induction Generator (DFIG) based Wind turbine (WT), which integrates a Dynamic Restorer (DVR). The DVR connect in series the DFIG output terminal and utility...

The design and implementation of a new control system for reactive power compensation and mechanical torque, voltage regulation and transient stability enhancement for wind turbines equipped with fixed-speed induction generators (IGs) in power systems is presented in this study. The designed optimal linear quadratic regulator (LQR) controller provides an acceptable post fault performance for bo...