NDLI: CRC and NHPWM method for test bench based on cascaded converter

Content Provider	IET Digital Library
Author	Hu, Yaowei Yang, Ranchen Shao, Yuting Chen, Guozhu
Abstract	This study describes a megawatt test bench based on the cascaded converter for the stability test of renewable energy generation system under different grid disturbances. The test bench is composed of two cascaded converters, which are used to control the output of fundamental voltage and harmonic voltage. Aiming at the defects of the traditional repetitive controller (RC) and hybrid pulse-width modulation (HPWM) method, configurable RC (CRC) and novel HPWM (NHPWM) method are presented. By flexibly configuring the zeros and poles of CRC, the harmonic order that can be tracked accurately and the time delay of CRC can be easily changed. Besides, with NHPWM, the number of modules modulated by carrier phase-shifted PWM can be arbitrarily configured according to the output voltage quality and switching loss. Therefore, the flexible CRC and NHPWM are beneficial to achieve high control accuracy of fundamental and harmonic voltage and fast dynamic response while considering the switching loss, which is verified by simulation. The detailed harmonic analysis and calculation method of NHPWM are given, which are also proved correct by comparison of theoretical calculation and simulation results.
Starting Page	11
Ending Page	21
Page Count	11
ISSN	17554535
Volume Number	12
e-ISSN	17554543
Issue Number	Issue 1, Jan (2019)
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/iet-pel/12/1
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/10.1049/iet-pel.2018.5477
Journal	IET Power Electronics
Publisher Date	2018-09-28
Access Restriction	Open
Rights Holder	© The Institution of Engineering and Technology
Subject Keyword	Cascaded Converter Control of Electric Power System Control System Analysis Delay Distributed Parameter Control System Dynamic Response Flexible CRC Grid Disturbances Harmonic Analysis Harmonic Order Harmonic Voltage Hybrid Pulse-width Modulation Method Mathematical Analysis Megawatt Test Bench NHPWM Output Voltage Quality Poles And Zeros Power Converter Power Grid Power Supplies to Apparatus Power System Control Power System Stability PWM Power Converter Renewable Energy Generation System Stability in Control Theory Stability Test Switching Loss Synthesis Method Voltage Control
Content Type	Text
Resource Type	Article
Subject	Electrical and Electronic Engineering

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