Switching pulse pattern optimisation for modular multilevel converters

Hassanpoor, ArmanKTH,Elektrisk energiomvandling,High Power Electronics (författare)

QC 20150512
Modular multilevel converters (MMCs) are widely used in different applications such as high voltage direct current (HVDC) applications. The HVDC station loss is highly related to the converter switching pulse pattern which is generated by modulation algorithm and cell selection methods. This paper formulates the switching pulse pattern generation, as a versatile optimisation problem. The problem constraints and objectives are formulated for HVDC applications and compared with similar problems in the field of computer science. To overcome the computational complexity in solving the introduced optimisation problem, a heuristic method is proposed for cell selection algorithm. The method utilizes the current level in order to obtain lossless switching at zero-current crossings. The study of the proposed method, in a time-domain simulation platform, shows that the method can reduce the switching converter losses by 60% compared to carrier-based modulation, maintaining the same capacitor voltage ripple. Although this paper focuses on HVDC, the mathematical model is applicable for any MMC application.

TEKNIK OCH TEKNOLOGIER Elektroteknik och elektronik Annan elektroteknik och elektronik hsv//swe
ENGINEERING AND TECHNOLOGY Electrical Engineering, Electronic Engineering, Information Engineering Other Electrical Engineering, Electronic Engineering, Information Engineering hsv//eng
HVDC power convertors
PWM power convertors
computational complexity
heuristic programming
losses
optimisation
switching convertors
time-domain analysis
zero current switching
HVDC station loss
MMC application
capacitor voltage ripple
carrier-based PWM algorithm
cell selection methods
computational complexity
computer science
converter switching pulse pattern generation optimisation
current level utilization
heuristic method
high voltage direct current applications
mathematical model
modular multilevel converters
switching converter losses reduction
time-domain simulation platform
zero-current crossings
Capacitors
HVDC transmission
Optimization
Switches
Switching loss
Tin
Voltage control
HVDC transmission
Power conversion
Switching frequency
Switching loss
SRA - Energy
SRA - Energi

Norrga, Staffan,1968-KTH,Elektrisk energiomvandling,High Power Electronics(Swepub:kth)u1sjojho (författare)
Lindgren, M. (författare)
KTHElektrisk energiomvandling (creator_code:org_t)

Ingår i:40th Annual Conference of the IEEE Industrial Electronics Society, IECON 2014, s. 4722-4728

Av författaren/redakt...: Hassanpoor, Arma ...; Norrga, Staffan, ...; Lindgren, M.

Om ämnet

TEKNIK OCH TEKNOLOGIER: TEKNIK OCH TEKNO ...; och Elektroteknik oc ...; och Annan elektrotek ...

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