NDLI: Implementation of seven level cascaded multilevel inverter in closed loop for different modulation index.

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Implementation of seven level cascaded multilevel inverter in closed loop for different modulation index.

Content Provider	CiteSeerX
Author	Kavitha, R. Thottungal, Rani Agalya, S.
Abstract	Abstract-This paper explains a control strategy SHE-PWM and a closed loop control of the cascaded multilevel inverter based on the modulation index. The modulation index is taken as the feedback to the cascaded multilevel inverter, the proposed system reduces the total harmonic distortion by optimizing the angles of the inverter and the DC voltage sources applied to the cascaded inverter. The specific lower order harmonics are eliminated by using SHE-PWM method. The optimized angles for the cascaded inverter are obtained by using the particle swarm optimization (PSO) algorithm for the various modulation indexes. The objective function is used to reduce the lower order harmonics in the output voltage. The simulation results of various modulation indexes and equal, unequal DC voltage sources for seven level cascaded multilevel inverter are carried out. The proposed closed loop control system reduces the harmonics by varying the optimized switching angles and DC voltage values provides to the inverter based on the modulation index. For the lower modulation index the device will operates in the reduced levels. II. PRINCIPLE OF OPERATION The seven level cascaded H bridge multilevel inverter includes[3] three H bridge which are connected in the cascaded connection.
File Format	PDF
Access Restriction	Open
Subject Keyword	Modulation Index Closed Loop Different Modulation Index Seven Level Cascaded Multilevel Inverter Multilevel Inverter Various Modulation Index Order Harmonic Closed Loop Control System Abstract-this Paper Objective Function Particle Swarm Optimization Principle Operation Dc Voltage Source Optimized Switching Angle Bridge Multilevel Inverter Output Voltage Closed Loop Control She-pwm Method Dc Voltage Value Cascaded Inverter Unequal Dc Voltage Source Simulation Result Cascaded Connection Optimized Angle Control Strategy She-pwm Reduced Level Total Harmonic Distortion Cascaded Multilevel Inverter
Content Type	Text

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