Standard lowand medium-power induction motor drives are based on the pulsewidth modulation (PWM) voltagesource inverter fed from a diode rectifier. The dual topology, based on the current-source inverter/rectifier structure is used in mediumand high-power applications. This paper analyzes the existing motor drives based on current-source topologies and proposes a control strategy that addresses...

To improve both the stability and disturbance suppression ability of single-phase grid-connected inverters through LCL filters, this paper proposes an inverter output impedance enhancing control mechanism. The mechanism employs a virtual node-voltage feedforward to ensure sufficient passivity high amplitude over wide frequency range interest. proposed is realized combination low-voltage bidirec...

Electric traction system uses voltage source inverter technology for three phase electric locomotives. This paper proposes Z source inverters to control the speed of locomotive drives. The acceleration region and free running region of operation of locomotive is considered for analysis. The control strategy for Z source inverter used is simple boost control. The speed control method for tractio...

This article proposes a dual two-level voltage-source inverter (DTL VSI) and its control to effectively integrate two dc sources into the multi-infeed ac/dc (MIACDC) power architecture of fully integrated energy systems (FIPESs). The current-controlled method is also synthesized proposed grid-connected DTL VSI. To this end, provides mathematical analyses comparing VSI with conventional VSIs (TL...

this paper presents a control strategy for fuel cell/energy storage power generation system during voltage sag conditions. the hybrid dc power sources are connected to grid using power electronic converters include dc-dc converter and grid connected voltage source inverter. the power from hybrid power sources is controlled during voltage sag by designing of control strategy for dc-dc converter....

The work presents the power-sharing in a standalone low voltage AC microgrid consisting of three parallel grid supporting inverters using virtual impedance-based droop system. Typically, isolated microgrids suffer unique challenges regarding voltage, current, frequency regulation, power flow control, and due to absence stiff source. This investigated sharing technical inverter-based distributed...

To eliminate the common-mode leakage current in the transformerless photovoltaic system, an improved high efficiency inverter H6 type configuration with Z-source is presented. The Z-source network can perform boost as well as sustained shoot through operation. Also, the improved transformer less inverter can sustain the same low input voltage as the full-bridge inverter and guarantee to complet...