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In this paper, a unified adaptive energy management scheme (EMS) is proposed for renewable-interfaced hybrid energy storage system (HESS) under grid connected/islanded conditions. A second harmonic based phased locked loop is employed for effective synchronization/resynchronization of the microgrid system under contingency conditions. The operation and management of the microgrid system under both...
The abstraction of harmonic and reactive current component in a grid interconnected photovoltaic (PV) system is proposed in this work. The proposed approach is based on triangular function which is useful in signal processing and provides harmonics and reactive current detection to estimate reference current to control grid interconnected PV system. The proposed method is modeled and implemented in...
This paper presents a harmonics current-less AC-DC power conversion system with the integration of a series active compensator to a large-rated double series diode rectifier. The series active compensator and the diode rectifier are directly connected in parallel thus shares a common dc bus. Due to this compensator, the diode rectifier draws three-phase sinusoidal currents from AC mains. In addition,...
A single-phase series active compensator is proposed to mitigate voltage sag, swell and voltage harmonics along with reducing harmonic currents at the AC mains. The DC link capacitor of the series active compensator is shared with a voltage fed load thus having a common DC link. The common DC link has an advantage of reduced component and immune to the wide variation in the voltage of AC mains, thus...
This paper deals with the grid integration of a double stage solar photovoltaic (SPV) power generating system using two-quadrature PLL (QPLL) based control, which also mitigates power quality problems in three phase, three wire distribution system. The proposed solar PV grid interfaced system consists of solar PV array, dc-dc boost converter, voltage source converter (VSC) and connected linear/nonlinear...
A 4-leg VSC (Voltage Source Converter) based SPV (Solar Photovoltaic) power generating system is integrated to a 4-wire distribution system using MISCT (Modified Instantaneous Symmetrical Component Theory) based control algorithm. This MISCT is used to estimate reference currents to control 4-leg VSC. The control algorithm is used to balance the loads and to improve the power factor of ac mains. The...
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