This paper analyses the effects of doubly fed induction generator (DFIG) tidal current turbines on a distribution grid under unbalanced voltage conditions of the grid. A dynamic model of an electrical power system under the unbalanced network is described in the paper, aiming to compare the system performance when connected with and without DFIG at the same location in a distribution grid. Exte...

This paper proposes a parallel-resonance bridge type fault current limiter (PRBFCL) to augment the transient stability of a hybrid power system consisting of a photovoltaic (PV) power generation source, a doubly-fed induction generator (DFIG)-based wind energy system, and a synchronous generator (SG). The PRBFCL is designed such a way that it can provide sufficient damping characteristics to th...

Hardware protection and control action are two kinds of low voltage ride-through technical proposals widely used in a permanent magnet synchronous generator (PMSG). This paper proposes an innovative clustering concept for the equivalent modeling of a PMSG-based wind power plant (WPP), in which the impacts of both the chopper protection and the coordinated control of active and reactive powers a...

This article presents ac fault ride-through strategies for the “extended-overlap” operating mode of alternate arm converter (AAC), which is a type modular multilevel voltage source that has been proposed HVdc transmission applications. The AAC offers several benefits over half-bridge converter, such as requiring fewer submodules with smaller capacitance and providing dc capability. Novel symmet...

Abstract After the fault isolation of outgoing power grid with a high proportion new energy, high-frequency shutdown third line defense is an important control measure to restrain rise frequency sending-end grid. With increase in intermittent sources such as wind and photo-voltaic power, characteristics have become more complex. Considering response emergency capabilities this paper proposes ri...

Modular multilevel converter (MMC) is a proven technology for HVDC applications due to its salient features such as modularity and excellent power quality. To ensure best possible grid support, recent codes require incorporating fault ride-through (FRT) strategies so that stations remain connected maintain reliable operation under various symmetrical asymmetrical AC faults. In this paper, commu...