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The purpose of this paper is to present a influences of parameter deviations on operation of a novel current sensorless AC-DC converter are discussed. The off time is calculated based on the equations of each operating state for boundary current control mode. The relationship among the THD, power factor and efficiency, and circuit parameter errors are discussed. When the circuit parameter varies from...
Electric spring is an emerging technology proven to be effective in stabilizing smart grid with substantial penetration of intermittent renewable energy sources. With the technology, traditional electric appliance can be a smart load to provide voltage supporting function in the power distribution network. This paper describes the load characterisation of electric spring. The mathematical derivations...
Smart micro-grids offer a new and wide application domain for power electronics. In fact, every distributed energy resource (DER) includes an electronic power processor (EPP) to control the power exchange with the grid. If such distributed EPPs perform cooperatively, they have the capability to fully exploit all renewable power sources and energy storage units while improving the power quality and...
The stochastic fluctuating offer of wind energy limits the capacity of supply in electrical grids by means of technical and economical reasons. To increase the supply, a concept of dynamic conditioning with the objective to increase the quality of supply was developed. The concept envisages support and management of the electrical grid respectively through compensation of active and reactive power...
Distribution systems (DS) are a focal connection point for existing and new renewable energy sources. DS have increasing sizes; they connect increasing numbers of renewable energy sources and have a mandate to operate as financial entities seeking to maximize their profits in an electricity market. To achieve these goals, DS require highly efficient planning tools. In this paper, we propose a successive...
This paper presents a control algorithm based on feedback linearization technique for grid-connected three-phase non-dispatchable distributed generation (DG) systems such as a wind or a solar based generator. The power electronic interface is a voltage source inverter (VSI) and the output low-pass filter is an inductance (L) or an inductance-capacitance-inductance (LCL) circuit. The control objectives...
The paper presents advanced vector control system for AC-DC-AC converter operating as grid interface for renewable energy systems. The control method is based on Direct Torque Control with Space Vector Modulation (DTC-SVM) for Machine Side Converter (MSC) and Direct Power Control with Space Vector Modulation (DPCSVM) for Line Side Converter (LSC). The whole control and protection system has been implemented...
This work proposes the use of DC-links between existing radial distribution feeders so that full advantage is taken of their maximum capacity, which is particularly important when new distributed generators are to be connected at the distribution level. An optimization tool is developed to determine the optimum settings for the DC-link control variables, in order to maximize the penetration of dispersed...
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