Cascaded H-bridge multilevel inverter-based DSTATCOM with an artificial neural fuzzy inference systembased controller

Abstract

<span>In this paper, <span>a voltage source inverter is utilized as a distributed static compensator (DSTATCOM). The DSTATCOM is used for the elimination of harmonics caused by the nonlinear load. The reference currents of DSTATCOM were estimated with a synchronous reference frame (SRF). Conventionally, the SRF uses voltage, load current and filter current to compute the reference current to track desired source current for DSTATCOM. The sliding mode controller and feedback linearization are used to design the current controller. The feedback linearization technique and sliding mode control are used to cancel nonlinearities and offer invariant stability due to modeling uncertainties due to the DSTATCOM parameter and external load disturbance. The sliding mode controller requires a rigorous mathematical model of the system. To overcome this, an artificial neuro-fuzzy inference system (ANFIS) is devised for the control of DSTATCOM. The training data of the ANFIS controller is generated from the sliding mode controller algorithm. The overall system of DSTATCOM including the ANFIS algorithm is implemented in MATLAB/Simulink SimPower block sets. The simulated response of DSTATCOM was found to be improved and better than the sliding mode controller scheme.</span></span>

Fundamental frequency switching strategies of a seven level hybrid cascaded H-bridge multilevel inverter

“…The exploratory outcomes acquired equilibrium three-stage yield flows under shortcoming activity. Introduced SMC based 3-stage 3-level two-leg NPC inverter for circulated age frameworks [24]- [26]. The proposed inverter geography diminished 4 switches, and 2 diodes in contrast with the ordinary three-stage neutral point clamped (NPC) inverter.…”

A differential current based protection scheme for DC microgrid

“…Thus, i 2 is the sum of all currents leaving the bus. In the case of the DC ring-bus microgrid, each bus has a single current leaving the bus [15]- [18]. This current itself is denoted as i 2 .…”

“…The differential current basedprotection scheme is examined. This scheme analyses the difference in the currents coming in and the currents going out of the equipment which is to be protected [15]- [18]. Then, based on whether this difference current exceeds a pre-determined value we decide whether a fault has occurred or not.…”