A modified cascaded h-bridge multilevel inverter based on particle swarm optimisation (PSO) technique

Airline fleet assignment is the process of assigning aircraft types to scheduled flight legs in order to minimize operating cost and achieve maximize revenue, while satisfying a set of constraints. This paper formulate the fleet assignment problem for airlines that optimization goal is to minimize the total assignment cost. Particle swarm optimization proposed to solve this model. The model successfully applied to Egyptair airline dataset using the particle swarm optimization and mixed integer programming. The proposed method compared with mixed integer programming and current Egyptair assignment methodology. The results showed that the particle swarm optimization is the best method for the Egyptair fleet assignment process. The solution quality is better than mixed integer programming and Egyptair assignment methodology where we saw a daily cost reduction with a percentage of 14.6% and 19.3% respectively.

Section: Psomentioning

confidence: 99%

Particle swarm optimization for airlines fleet assignment

Abouzeid

Eldin

Razek

2021

“…Apart from the conventional two-level inverter, the application of multilevel inverter (MLI) in PV system has gained a huge interest due to its many advantages, such as a lower rating component usability, better quality of output waveform and higher efficiency [13]. Several types of multilevel inverter are available and among them, the cascaded H-bridge MLI with much simpler topology has been widely discussed and applied such as in the optimization of component number and voltage supply [14], utilization of multicarrier modulation technique [15] and modified phase-shift PWM scheme [16], as well as application in standalone PV inverter system [17].…”

Section: Introductionmentioning

confidence: 99%

Design and simulation of cascaded H-bridge multilevel inverter with energy storage

Ting

Rasin

Ching

2021

<p>Stand-alone power system provides a solution for the user in rural areas that are disconnected from the utility grid which requires power electronics device for the power conversion. This work proposes a design of 5-level cascaded H-bridge inverter with energy storage to realize DC-AC power conversion for such system. The DC-DC bidirectional converter is designed to control the charging and discharging of current into/from the battery during the buck and boost mode of operation. At the DC side, dual-loop control strategy using PI controllers is designed to control the current and voltage. The inner loop current controller controls the recharging/discharging of current for the battery, while the outer voltage controller controls the DC link voltage at 200 V for each of the H-bridge unit. At the AC side, multiple feedback loop control strategy regulates the inverter output voltage at 240 Vrms under various load change. The modelling and design of the system is implemented under Matlab Simulink environment. From the results, the battery storage unit works well with the DC link voltage to achieve a balance power transfer within the system between the PV source, load and battery storage under variation of PV power and loading condition.</p>

“…The modulation technique significantly affects the power quality of the inverter output voltage. There have been many modulation solutions published, in most these solutions, the control signals are compared directly with the carrier waves that have not been modulated [12][13][14][15][16]. Due to the independence between the carrier wave and the control signal, this makes the carrier wave not contain information of any quantities.…”

Section: Introductionmentioning

confidence: 99%

Reduction of common mode voltage for cascaded multilevel inverters using phase shift keying technique

Nguyen

Tran

2021

Demand of cascaded multilevel inverters in industries of electric drives and renewable energy is increasing due to their large-scale capacity and high voltage. The modulation technique of inverters significantly affects the power quality of the inverter output voltage. This paper proposes a new method of carrier wave modulation using the phase shift keying technique for cascaded multilevel inverters. The phase of a constant frequency carrier wave is changed at an accurate time by an input sinusoidal control signal. This modulation technique is simply implemented and only needs a small memory. It also helps reduce the common mode voltage of inverters in order to suppress the output voltage harmonics. Moreover, the ability to reduce switching count also helps the inverters decrease switching loss. The simulated and experienced results on a cascaded 9-level 3-phase inverter and an F28379D DSP kit have validated the performance of the proposed technique compared with that of the APOD and POD methods.