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This paper explores the possibility of using grid side inverter as an interface to connect energy storage systems. A dual inverter system, formed by cascading two 2-level inverters through a coupling transformer, is used as the testing model. The inverters are named as “main inverter” and “auxiliary inverter”. The main inverter is powered by the rectified output of the wind generator while the auxiliary...
An over modulation strategy for matrix converter (MC) is put forward on the basis of conventional AC/DC/AC MC control theory. At first, fictitious AC/DC rectifier is over modulated to get the greatest dummy DC voltage, then fictitious DC/AC inverter is modulated from linear region to six-step modes seamlessly, which effectively improve the voltage utilization. Voltage transfer ratio under different...
This paper presents the control of three-phase inverters connected to the grid by using the concepts of the instantaneous abc theory and the effective apparent power Se. These concepts allow the control of the three-phase inverter from a phasorial point of view both in magnitude and phase. The regulation of the instantaneous reactive power Q allows the instantaneous control of the phase delay phi...
One of the desirable properties of inverters in three-phase systems is the ability to feed unbalanced/non-linear loads with voltage and frequency nominal values. Therefore, three-leg four-wire inverters are expected to play an essential role in future power systems because of their ability to handle the neutral current caused by unbalanced or non-linear loads. This paper introduces an original control...
A new space vector modulation (SVM) technique having a full and independent control of the multiple voltage space vectors of a six-phase voltage source inverter is presented in this paper. The proposed space vector approach is based on three-phase decomposition, leading to the modulation of two three-phase VSIs. The six-phase load consists in a dual three-phase induction motor, with insulated neutral...
Multiphase motor drives are a very promising technology, especially for medium and high power ranges. As known, a multiphase motor drive cannot be analyzed using the space vector representation in a single d-q plane, but it is necessary to introduce multiple d-q planes. So far a general space vector modulation for multiphase inverters is not available due to the inherent difficulty of synthesizing...
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