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This work presents the design of an autonomous, cost-effective and efficient solar powered irrigation pump using a switched reluctance motor (SRM) drive. The proposed system utilizes a modified CSC (Canonical Switching Cell) converter for power optimization of photovoltaic (PV) array. The continuous inductor current mode (CICM) working of DC-DC converter significantly minimizes the stresses on its...
This paper presents a differential current compensation technique for partially shaded PV string. The proposed technique integrates an input parallel output series (IPOS) configuration of DC-DC flyback converters with distributed digital voltage mode control. PV modules in the string are interfaced with IPOS configuration of flyback converters. Each dedicated converter is regulated at the MPP voltage...
The paper proposes a two input Switched Inductor Hybrid Buck-SEPIC DC-DC converter (TIHBSC) topology, for Low Voltage DC-grid (LVDG) applications. The projected topology is capable of providing extra bucking with one source. On account of excessive stepping down of the input dc voltage the converter uses additional energy storage components and hence it belongs to fifth order family. Power flow is...
In this paper a robust sliding mode controller is designed for DC-DC Ćuk converter. Sliding surface of the controller includes all of the system state variables. Hence, proposed controller has four-loop structure. Reference values of the state variables are calculated according to output voltage references using feedforward and feedback control loops. Designed controller can regulate output voltage...
The systematic design of a Linear Quadratic Regulator (LQR) state-feedback controller with an integral action is presented for a quadratic DC/DC boost converter topology. The weighting factors are selected with respect to energy considerations. By using a Kalman Filter for both filtering and state estimation purpose a Linear Quadratic Gaussian (LQG) controller is obtained. For the proper operation...
A solid-state transformer (SST) would be at least as efficient as a conventional version but would provide other benefits as well, particularly as renewable power sources become more widely used. Among its more notable strong points are on-demand reactive power support for the grid, better power quality, current limiting, management of distributed storage devices and a dc bus. Most of the nation's...
This paper presents a new robust control strategy to improve the steady-state and transient stabilities of a grid connected large scale photovoltaic (PV) system. The grid codes for PV system to provide dynamic grid support are getting stricter due to the substantial increase in the power generation from grid connected PV systems, in recent years. The proposed control scheme helps quick voltage recovery...
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