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For many offshore activities, including offshore oil and gas exploration and offshore wind farm construction, it is essential to keep the position and heading of the vessel stable. The dynamic positioning system is a progressive technology, which is extensively used in shipping and other maritime structures. To maintain the vessels or platforms from displacement, its thrusters are used automatically to control and stabilize the position and heading of vessels in sea state disturbances. The theory of dynamic positioning has been studied and developed in terms of control techniques to achieve greater accuracy and reduce ship movement caused by environmental disturbance for more than 30 years. This paper reviews the control strategies and architecture of the DPS in marine vessels. In addition, it suggests possible control principles and makes a comparison between the advantages and disadvantages of existing literature. Some details for future research on DP control challenges are discussed in this paper.
Mojtaba Mehrzadi; Yacine Terriche; Chun-Lien Su; Muzaidi Othman; Juan C. Vasquez; Josep M. Guerrero. Review of Dynamic Positioning Control in Maritime Microgrid Systems. Energies 2020, 13, 3188 .
AMA StyleMojtaba Mehrzadi, Yacine Terriche, Chun-Lien Su, Muzaidi Othman, Juan C. Vasquez, Josep M. Guerrero. Review of Dynamic Positioning Control in Maritime Microgrid Systems. Energies. 2020; 13 (12):3188.
Chicago/Turabian StyleMojtaba Mehrzadi; Yacine Terriche; Chun-Lien Su; Muzaidi Othman; Juan C. Vasquez; Josep M. Guerrero. 2020. "Review of Dynamic Positioning Control in Maritime Microgrid Systems." Energies 13, no. 12: 3188.
Trending in the maritime industry nowadays, is towards an energy efficient and fuel saving. Moreover, concerns regarding global warming issues caused by massive air pollution in sea area by the ship combustion engine and depletion of fossil fuels have attracted attention and opportunities for many parties. The electric propulsion has been used in ship for many years. It has triggered the concept of all electric ship where all electrical equipment including electric propulsion, connected to the electrical networks to achieve better fuel consumption with less emission. However, the main generation in the ship is still diesel generators. Connecting more generator in parallel is normal practice to cater the load. However, due to the nature of non-linear characteristic in thermal unit, such as diesel generator, based on specific fuel consumption (SFC) curve, the generator loading is not efficient when running the generator with low load factor or higher SFC. Thus, the effective energy scheduling is needed among the generators so that the generators is operated in optimum point. The case study in this paper is ferry, with a conversion from traditional diesel mechanical power to electric propulsion powered by diesel generator as a main source and energy storage as secondary source. This paper analyzes how much the operating cost of the scheduled system implemented in this practical electric ferry based on an estimation of SFC curve considering the dynamic load profile.
Muzaidi Othman; Chun-Lien Su; Amjad Anvari-Moghaddan; Josep Guerrero; Hiroyasu Kifune; Jen-Hao Teng. Scheduling of Power Generations for Energy Saving in Hybrid AC/DC Shipboard Microgrids. 2018 IEEE Industry Applications Society Annual Meeting (IAS) 2018, 1 -7.
AMA StyleMuzaidi Othman, Chun-Lien Su, Amjad Anvari-Moghaddan, Josep Guerrero, Hiroyasu Kifune, Jen-Hao Teng. Scheduling of Power Generations for Energy Saving in Hybrid AC/DC Shipboard Microgrids. 2018 IEEE Industry Applications Society Annual Meeting (IAS). 2018; ():1-7.
Chicago/Turabian StyleMuzaidi Othman; Chun-Lien Su; Amjad Anvari-Moghaddan; Josep Guerrero; Hiroyasu Kifune; Jen-Hao Teng. 2018. "Scheduling of Power Generations for Energy Saving in Hybrid AC/DC Shipboard Microgrids." 2018 IEEE Industry Applications Society Annual Meeting (IAS) , no. : 1-7.
Concerns about the impact of global warming caused by air pollution and depletion of fossil fuels have attracted attention and opportunities in transportation especially in maritime industry. In all electric ships, the electrical equipment including electric propulsion is connected to the common ship electrical network to achieve better fuel consumption with less emission. However, the low-load factor of the parallel diesel generators (DGs) in some operating conditions, can negatively affect the fuel consumption rate. As an alternative, two or more power sources such as batteries and renewable-based prime movers can be integrated into the system aboard to improve the overall system performance. By optimal scheduling of the power sources, poor low-load efficiency can be avoided and controllable units can be dispatched in an emission-aware and cost-effective manner. This paper analyzes how much the operating cost of a shipboard system can be improved (based on estimation of specific fuel consumption (SFC) curve of a real system) considering the dynamic load profile with and without energy storage systems (ESSs). The case study in this paper is a ferry with a conversion from traditional diesel mechanical power to electrical propulsion powered by DGs and ESSs.
Muzaidi Othman; Amjad Anvari-Moghaddan; Norbaizura Ahamad; Su Chun-Lien; Josep Guerrero. Scheduling of Power Generation in Hybrid Shipboard Microgrids with Energy Storage Systems. 2018 IEEE International Conference on Environment and Electrical Engineering and 2018 IEEE Industrial and Commercial Power Systems Europe (EEEIC / I&CPS Europe) 2018, 1 -6.
AMA StyleMuzaidi Othman, Amjad Anvari-Moghaddan, Norbaizura Ahamad, Su Chun-Lien, Josep Guerrero. Scheduling of Power Generation in Hybrid Shipboard Microgrids with Energy Storage Systems. 2018 IEEE International Conference on Environment and Electrical Engineering and 2018 IEEE Industrial and Commercial Power Systems Europe (EEEIC / I&CPS Europe). 2018; ():1-6.
Chicago/Turabian StyleMuzaidi Othman; Amjad Anvari-Moghaddan; Norbaizura Ahamad; Su Chun-Lien; Josep Guerrero. 2018. "Scheduling of Power Generation in Hybrid Shipboard Microgrids with Energy Storage Systems." 2018 IEEE International Conference on Environment and Electrical Engineering and 2018 IEEE Industrial and Commercial Power Systems Europe (EEEIC / I&CPS Europe) , no. : 1-6.
This paper presents the optimal design and specifies the dimension, energy planning and evaluates the performance of a microgrid to supply the electricity to the load by using integrated microgrid. The integrated system consists of PV, wind turbine and a battery for grid-connected. This paper also analyzes the performance of the designed system based on seaport located in Copenhagen, Denmark as a case study. The analysis is performed by using Hybrid Optimization Model for Electric Renewables (HOMER) software which includes optimization and sensitivity analysis result. The simulation result indicates that the implementation of microgrid technologies would be a convenient solution to supply the electricity to the load applied (shipboard).
Nor Baizura Ahamad; Muzaidi Othman; Juan C. Vasquez; Josep Guerrero; Chun-Lien Su. Optimal sizing and performance evaluation of a renewable energy based microgrid in future seaports. 2018 IEEE International Conference on Industrial Technology (ICIT) 2018, 1043 -1048.
AMA StyleNor Baizura Ahamad, Muzaidi Othman, Juan C. Vasquez, Josep Guerrero, Chun-Lien Su. Optimal sizing and performance evaluation of a renewable energy based microgrid in future seaports. 2018 IEEE International Conference on Industrial Technology (ICIT). 2018; ():1043-1048.
Chicago/Turabian StyleNor Baizura Ahamad; Muzaidi Othman; Juan C. Vasquez; Josep Guerrero; Chun-Lien Su. 2018. "Optimal sizing and performance evaluation of a renewable energy based microgrid in future seaports." 2018 IEEE International Conference on Industrial Technology (ICIT) , no. : 1043-1048.
Strict regulation on emissions of air pollutants imposed by the maritime authorities has led to the introduction of hybrid microgrids to the shipboard power systems (SPSs) which acts toward energy efficient ships with less pollution. A hybrid energy system can include different means of generation such as renewables (e.g., solar PV, wind power) and conventionals (e.g., diesel engines) as well as energy storage systems (ESSs) such as batteries, fuel cells and flywheels. To optimally manage different energy sources in a shipboard microgrid while meeting different technical/environmental constraints, it is necessary to set up an energy management system. This paper provides an overview of hybrid shipboard microgrids and discusses different methods of power and energy management in such systems which are essential for control, monitoring and optimizing the overall system performance in various mission profiles.
Muzaidi Othman; Amjad Anvari-Moghaddan; Josep Guerrero. Hybrid shipboard microgrids: System architectures and energy management aspects. IECON 2017 - 43rd Annual Conference of the IEEE Industrial Electronics Society 2017, 6801 -6806.
AMA StyleMuzaidi Othman, Amjad Anvari-Moghaddan, Josep Guerrero. Hybrid shipboard microgrids: System architectures and energy management aspects. IECON 2017 - 43rd Annual Conference of the IEEE Industrial Electronics Society. 2017; ():6801-6806.
Chicago/Turabian StyleMuzaidi Othman; Amjad Anvari-Moghaddan; Josep Guerrero. 2017. "Hybrid shipboard microgrids: System architectures and energy management aspects." IECON 2017 - 43rd Annual Conference of the IEEE Industrial Electronics Society , no. : 6801-6806.
This paper presents a three-phase switched-battery multilevel (SBM) inverter for solar photovoltaic (PV) applications. The proposed inverter requires less number of power MOSFETs and gate drivers, and therefore, it is expected to be more compact and reliable than the conventional cascaded H-bridge multilevel (CHBM) inverter. For example, sixty units of power MOSFETs are required to construct a three-phase 11-level CHBM inverter, whilst a SBM inverter with the same number of levels needs only 27 units. The switching losses of the SBM inverter are expected to be lower than that in conventional PWM-controlled inverters because the power MOSFETs in the SBM inverter are switched at a much lower frequency. In addition, the proposed inverter has an integrated charge mode operation which is very suitable for solar PV applications. The performance of an 11-level SBM inverter has been evaluated using PSIM software and the simulation results confirm that the proposed inverter is capable of producing low total harmonic distortion (THD) AC voltages without the need of bulky filters.
Mohd Aizuddin Yusof; Muzaidi Othman; Sze Sing Lee; Mohd Azrik Roslan; J. H. Leong; Marini Othman. Three-phase multilevel inverter with reduced number of active power semiconductor switches for solar PV modules. 2014 2nd International Conference on Electronic Design (ICED) 2014, 329 -334.
AMA StyleMohd Aizuddin Yusof, Muzaidi Othman, Sze Sing Lee, Mohd Azrik Roslan, J. H. Leong, Marini Othman. Three-phase multilevel inverter with reduced number of active power semiconductor switches for solar PV modules. 2014 2nd International Conference on Electronic Design (ICED). 2014; ():329-334.
Chicago/Turabian StyleMohd Aizuddin Yusof; Muzaidi Othman; Sze Sing Lee; Mohd Azrik Roslan; J. H. Leong; Marini Othman. 2014. "Three-phase multilevel inverter with reduced number of active power semiconductor switches for solar PV modules." 2014 2nd International Conference on Electronic Design (ICED) , no. : 329-334.