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Abstract: This paper presents a new control algorithm for an active power filter (APF) to compensate harmonic and reactive power of a 3-phase thyristor bridge rectifier under non-ideal mains voltage scenarios. Sensing load current, dc bus voltage and source voltages compute reference currents of the APF. APF driving signals are produced with these signals via a hysteresis band current controller. Matlab/simulink power system toolbox is used to simulate the proposed system. The proposed method''s performance is compared with conventional instantaneous power (p–q) theory. The simulation results are presented and discussed showing the effectiveness of the control algorithm. The proposed algorithm is found quite satisfactory to compensate the reactive power and harmonics under non-ideal mains voltage conditions. The increased performance of the active power filter under different non-sinusoidal mains voltage and dynamic load conditions are extensively demonstrated. [Copyright &y& Elsevier]

Abstract Energy storage technologies will become an important grid integration part of the renewable energy systems (RES) in near future. Using energy storage with RES is the best way of utilizing renewable power and reducing the conventional fossil fuel consumption. Sudden variation of load demand requires energy storage with high power density ability. This paper includes a hybrid energy storage system (HESS) that contains both high energy and power density storage battery bank and ultra-capacitor unit respectively to respond the above-mentioned necessities. The proposed power system arrangement and the dynamic energy management algorithm can vigorously supply the dynamic load demand supported by the components of the hybrid energy storage system, photovoltaic power and grid connection. Control of the unit by an energy management algorithm, depending on the dynamic changes in the system is provided. Experimental test results are presented in this paper to demonstrate the feasibility of the proposed energy management structure. The validity of the proposed dynamic energy management algorithm with efficient converter is experimentally tested in laboratory based prototype HESS in smart grid. Highlights • Dynamic energy management algorithm is developed for a hybrid energy storage system. • The hybrid energy storage system consisting of battery bank and ultra-capacitor unit is investigated. • Integration of 3-phase 4-wire inverter structure to smart grid is experimentally tested. • The hybrid energy storage device has high power density, fast response, and high efficiency is proposed. • The smart energy management control strategy has been verified on a laboratory test set-up. [ABSTRACT FROM AUTHOR]