A Real-Time Selective Harmonic Compensation (SHC) based on Asymmetric Switching Angle Modulation and Current Feedback Control for Cascaded Modular Multilevel Inverters

Hui Zhao ;   Shuo Wang

Tags asymmetric switching angle modulation selective harmonic compensation real time equation-system transformation

With asymmetric switching angle modulation technique, a cascaded modular multilevel inverter (CMI) is able to control real power flow,…

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Eliminating the Influence of Capacitor Voltage Ripple on Current Control for Grid-Connected Modular Multilevel Converter

Deliang Wu ;   Li Peng

Tags Modular Multilevel Converter Direct Modulation Harmonic Analysis

The harmonics in the output voltage of modular multilevel converter with direct modulation method are analyzed. Proportional-resonant…

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Identification of Resonances in Parallel Connected Grid Inverters with LC- and LCL-Filters

Raimo Juntunen ;   Juhamatti Korhonen ;   Tatu Musikka ;   Liudmila Smirnova ;   Olli Pyrhönen ;   Pertti Silventoinen

Tags LC-Filter LCL-Filter Resonance Resonance Frequency Parallel Connected Grid Inverter Identification

The publication is concentrated on studying the resonances in parallel connected grid filters, (LC and LCL). The parallel connection of high…

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Indirect Thermal Control for Improved Reliability of Modular Multilevel Converter by Utilizing Circulating Current

Mohammad Kazem Bakhshizadeh ;   Ke Ma ;   Poh Chiang Loh ;   Frede Blaabjerg

Tags MMC Circulating current active thermal control reliability thermal cycling

Modular Multilevel Converter (MMC) has recently become a popular multilevel topology for high-power applications, where the reliability…

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Modulation and Control of a High Performance Hybrid Cascade H-Bridge Seven-Level Active Power Filter with Star Configuration

Zhong Chen ;   Yaming Xu ;   Zhihui Wang ;   Mengnan Li

Tags active power filter hybrid cascade modulation total voltage control voltage distribution control

This paper presents a three-phase four-wire shunt active power filter (APF) based on hybrid cascade H-bridge seven-level converter as its…

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PLL-Less Robust Active and Reactive Power Controller for Single Phase Grid-Connected Inverter with LCL Filter

Xiao Li ;   Robert S. Balog

Tags grid connected inverterLCL filter decoupled power controlstationary reference PLL-lessnon-ideal grid

In this paper, a simplified and robust controller for single-phase grid-connected inverter with LCL filter is proposed. The synchronization…

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Power-Weighting-based Multiple Input and Multiple Output Control Strategy for Single-Phase PV Cascaded H-Bridge Multilevel Grid-Connected Inverter

Qingyun Huang ;   Mengqi Wang ;   Wensong Yu ;   Alex Q. Huang

Tags power-weighting decouple PV current estimation S&H Feed-forward

This paper presents a power-weighting-based multiple input and multiple output control strategy and performance improvements schemes for…

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Smooth Mode Transition of a DC Bus Voltage Controlled PV Inverter using a Novel Phase Locked Loop Method

Partha Pratim Das ;   Souvik Chattopadhyay

Tags PLL Utility grid Standalone mode Dsp

This paper describes a control algorithm for smooth transition from standalone to Grid connected mode and grid connected to SA mode of a…

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Startup Schemes for Modular Multilevel Converter under Different Load Conditions

Xiaojie Shi ;   Bo Liu ;   Zhiqiang Wang ;   Yalong Li ;   Leon M. Tolbert ;   Fred Wang

Tags Modular multilevel converter (MMC) high-voltage direct-current (HVDC) transmission systems startup feedforward control

Due to distributed capacitors of MMC inverter, a special capacitor charging process is required in some applications to avoid large inrush arm…

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