Transputer based harmonic-elimination PWM control of inverter drives

2003 ◽  
Author(s):  
S.R. Bowes ◽  
P.R. Clark
Keyword(s):  
Pwm Control ◽  
Harmonic Elimination

MSHE-PWM Control of Modular Multilevel Direct Current Transmission System

2015 ◽  
Vol 9 (1) ◽  
pp. 553-559
Author(s):  
HU Xin-xin ◽  
Chen Chun-lan
Keyword(s):  
Pulse Width Modulation ◽  
Reactive Power ◽  
Balance Control ◽  
Electric Energy ◽  
Access Point ◽  
Experimental Result ◽  
Switching Frequency ◽  
Pwm Control ◽  
Harmonic Elimination

In order to optimize the electric energy quality of HVDC access point, a modular multilevel selective harmonic elimination pulse-width modulation (MSHE-PWM) method is proposed. On the basis of keeping the minimum action frequency of the power device, MSHE-PWM method can meet the requirement for accurately eliminating low-order harmonics in the output PWM waveform. Firstly, establish the basic mathematical model of MMC topology and point out the voltage balance control principle of single modules; then, analyze offline gaining principle and realization way of MSHEPWM switching angle; finally, verify MSHE-PWM control performance on the basis of MMC reactive power compensation experimental prototype. The experimental result shows that the proposed MSHE-PWM method can meet such performance indexes as low switching frequency and no lower-order harmonics, and has verified the feasibility and effectiveness thereof for optimizing the electric energy quality of HVDC access point.

scholarly journals A VSC Transmission System Using Flying Capacitor Multilevel Converters and Selective Harmonic Elimination PWM Control

2006 ◽  
Vol 5 (2) ◽  
Author(s):  
Lie Xu ◽  
Vassilios G. Agelidis
Keyword(s):  
Pulse Width Modulation ◽  
Control Method ◽  
Transmission System ◽  
Voltage Source ◽  
Pwm Control ◽  
Multilevel Converters ◽  
Harmonic Elimination ◽  
Selective Harmonic Elimination ◽  
Small Change ◽  
Current Polarity

A transmission system based on voltage-source three-level flying capacitor (FC) multilevel converters with selective harmonic elimination pulse-width modulation (SHE-PWM) control is presented in this paper. The generation of the switching patterns for each power device is described taking into account the natural balancing of the FC voltages. A new and simple control method for balancing the FC voltages of the FC converter when using SHE-PWM is proposed which is based on the small change of the firing angle according to the load current polarity. Implementation of the SHE-PWM with capacitor voltage balancing is provided. Simulation studies for a 300MW/+-150kV transmission system are presented to confirm the satisfactory performance of the proposed system.

scholarly journals Desain Rangkaian Gate Driver Analog untuk Dual Mosfet Drivers

2021 ◽  
Vol 21 (2) ◽  
pp. 714
Author(s):  
Hendi Matalata ◽  
Rozlinda Dewi
Keyword(s):  
Power Converter ◽  
Power Supplies ◽  
Pwm Control ◽  
Space Vector Pwm ◽  
Space Vector ◽  
Analog Ic ◽  
Advantages And Disadvantages ◽  
Harmonic Elimination ◽  
Driver Circuit ◽  
Gate Driver

Switching techniques have been continued to develop, including sinusoidal PWM, space vector PWM, current tracking PWM, harmonic elimination PWM and others. Each method has advantages and disadvantages, but the most commonly used methods are sinusoidal PWM and space vector PWM. PWM that is generated using a microcontroller or analog IC component generally has a maximum voltage value of 5V. To strengthen the PWM wave, a gate-driver circuit is needed, so that the PWM control wave is able to move the IGBT / MOSFET. On this paper, the design of gate driver circuit use An analog IC, which starts from the generation of two waves, namely a sinusoidal wave and a DC source to be compared (Comparator) so that it can produce a PWM wave. Then this PWM wave is isolated using an optocoupler and MOSFET driver IC to limit interference in the switching process on high power supplies. Based on the results, it can be cancluded PWM control wave output from the gate-driver circuit is isolated from the system intended for designing a power converter and other applications.

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