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Communication bandwidth inconsistency between traditional secondary control and tertiary control may decrease the economic efficiency of a microgrid. To solve the problem, this study proposes a fully distributed cooperative strategy in secondary level to minimize the operation cost in an AC microgrid and achieve the synchronization of the voltage and frequency. The proposed strategy is based on the...
An indirect matrix converter (IMC) is a direct ac-ac power converter. As an improvement of the output waveform quality, several types of three-level IMC are proposed and investigated. However, two major problems of these converters still exist. First, in some specific situations, such as wind energy conversion systems and flexible ac transmission systems, these converters’ capabilities of generating...
Compared to the traditional AC-DC-AC power converter, the matrix converter (MC), as a kind of universal power transformation device, can easily achieve n phase to m phase transformation. The matrix converter can generate controllable sinusoidal output voltage and input current, provide unit input power factor, have no intermediate storage link and energy can be bi-directional transferred with fast...
Based on Matrix Converter-Permanent Magnet Synchronous Machine (MC-PMSM) speed regulator system simulation platform, this paper investigates the behavior and characteristics of MC-PMSM drive system under the condition of MC switch short-circuit faults. Two isolation strategies by utilizing semiconductors and high speed fuses for MC switch short-circuit faults are. Behavior of MC-PMSM drive system...
A five-leg inverter can be used to feed two motors, which reduce the system cost and realize fault-tolerant operation of dual motor drive system. In this paper, a PWM modulation method is developed for the five-leg inverter, in which the control period is divided into two parts and the traditional Space Vector PWM (SVPWM) technology is adopted in both parts. This PWM method is suitable to be implemented...
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