A stochastic optimal approach for fundamental frequency modulated modular multilevel converter
San Diego, CA（2012）
摘要
This paper presents a fundamental switching frequency strategy for modular multilevel converter (MMC) with PSO based stochastic optimal approach. In case of the number of sub-modules at the upper or lower arm of MMC is not even, a reasonable multilevel modulation mechanism is designed, which is also suitable for non-traditional 2N+1 level modulation application. To calculate switching angle adopted in the modulation method, an appropriate objective function is established; the initial value of the Newton iteration method is investigated by using the stochastic optimization of PSO. Theoretical results are verified by simulations for a 19-level modular multilevel inverter. The effectiveness of proposed control strategy is verified by simulative results.
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关键词
switching convertors,non-duality,fundamental switching frequency modulation,modular multilevel inverter,switching angle,pso,particle swarm optimisation,fundamental switching frequency strategy,fundamental frequency modulated modular multilevel converter,newton method,stochastic optimization,electric current control,control strategy,particle swarm optimization (pso),newton iteration method,particle swarm optimization,nontraditional 2n+1 level modulation,mathematical model,switches,modulation,capacitors,harmonic analysis
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