Abstract
The multilevel inverters (MLI) are resourceful in producing a voltage waveform with superior-quality staircase counterfeit sinusoidal and depressed harmonic distortion (THD). Several conventional topologies are proposed to realize the MLI however, the limitations of these topologies may involve more DC sources and power-switching devices, and less THD, which in turn, increases the cost and size of the inverter. These drawbacks can be eliminated with the proposed hybrid Cascaded H-Bridge Multilevel Inverter with reduced components topology. As compared with the established MLI topologies the recommended topology having a reduced number of DC sources, power-switching devices, component count level factor, lesser TSV, more efficient, lesser THD, and cost-effective. The proposed MLI is a blend of a single-phase T-Type inverter and an H-Bridge module made of sub switches. This article incorporates the design and simulation of the multilevel inverter with staircase PWM technique. Further, the 9-level and 17-level MLI is examined with different combinational loads. The proposed inverter is stable during nonlinear loads, and it is well suited for FACTS and renewable energy grid-connected applications. An operational guideline has been explained with correct figures and tables. The Output voltage wave is realized in numerical simulation. Finally, the experimental demonstrations were performed by implementing a hardware prototype setup for both linear and nonlinear loads using the dSPACE controller laboratory.
Highlights
Present in many industrial applications has bid higher power appliances in the last couple of years
Such as lesser harmonic distortion, simplified filters, better wave capability taking after a sinusoidal output, and reduced voltage stress dv/dt up on the switches, because of excellent power quality, multilevel inverters (MLI) are broadly used in all disciplines of electrical engineering, for example, renewable energy conversion, high voltage DC transmission, distributed generation (DG) system, modern drive applications, uninterruptible power supplies, and so on [2]
COMPARISON STUDY The asymmetrical configuration of the presented inverter topology is compared with the asymmetrical structure of Cascaded H-bridge (CHB) multilevel inverter, Neutral point clamped (NPC) multilevel inverter, flying capacitors (FC) multilevel inverter, and some other similar multilevel inverter topologies
Summary
Present in many industrial applications has bid higher power appliances in the last couple of years. Mode 1: Capacitor, C2 acts as a voltage source, and bidirectional switch Sa, Switches S2, S6 are in conduction state the path of load current (I0) is through C2- Sa- D8-loadD2-S6-C2, the output voltage level is + VDC/2, i.e. Mode 5: Capacitor, C1 acts as voltage sources and bidirectional switch SA, switches S5, S3 are in conduction state the path of load current I0 is through C1-S5-D3-loadSa- D7-C1, the output voltage level is (–VDC/2), i.e. SEVENTEEN LEVEL INVERTER TOPOLOGIES The proposed 17-level MLI is designed with two developed 9 level units in cascaded without additional circuit components
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have