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| 1 | Asymmetrical Multi-level DC-link Inverter for PV Energy System with Perturb and Observe Based Voltage Regulator and Capacitor Compensator显示文摘In this paper, a perturb and observe(P&O) based voltage regulator(POVR) and a capacitor compensator(CC)circuit are proposed for the implementation on 31-level asymmetrical switch-diode based multi-level DC-link(MLDCL) inverter. Since the application of MLDCL in a standalone photovoltaic(PV) system requires constant DC voltages from PV panels, the POVR strategy is deployed to regulate the voltage along with the capability to deliver the maximum power at full load.Boost DC-DC converters are used as the interface between the panels and the inverter for the POVR operation. The results show that POVR is capable of achieving the desired fixed DC voltages even under varying environmental and load conditions,with a steady 230 V at the output. At full load, the standalone system successfully delivers 97.21% of the theoretical maximum power. Additionally, CC is incorporated to mitigate voltage spikes at the output when supplying power to inductive loads.It successfully eliminates the spikes and also reduces the total harmonic distortion(THD) of output current and voltage from more than 10% to less than 5%, as recommended in IEEE 519 standard. | Muhammad Najwan Hamidi Dahaman Ishak Muhammad Ammirrul Atiqi Mohd Zainuri Chia Ai Ooi Tarmizi Tarmizi | 2021 | Journal of Modern Power Systems and Clean Energy2021，9，1： | 2 |
| 2 | Predictive control of plug-in electric vehicle chargers with photovoltaic integration显示文摘This paper presents a model predictive control(MPC) for off-board plug-in electric vehicle(PEV)chargers with photovoltaic(PV) integration using two-level four-leg inverter topology. The PEV charger is controlled by a unified controller that incorporates direct power and current MPC to dynamically control decoupled active-reactive power flow in a smart grid environment as well as to control PEV battery charging and discharging reliably. PV power generation with maximum power tracking is seamlessly integrated with the power flow control to provide additional power generation. Fast dynamic response and good steady-state performance under all power flow modes and various environmental conditions are evaluated and analyzed. From the results obtained, the charger demonstrates less than 1.5% total harmonic distortion as well as low active and reactive power ripple of less than 7% and 8% respectively on the grid for all power flow modes. The PEV battery also experiences a low charging and discharging current ripple of less than 2.5%. Therefore,the results indicate the successful implementation of the proposed charger and its control for PV integrated offboard PEV chargers. | Adrian Soon Theam TAN Dahaman ISHAK Rosmiwati MOHD-MOKHTAR Sze Sing LEE Nik Rumzi Nik IDRIS | 2018 | Journal of Modern Power Systems and Clean Energy2018，6，6： | 2 |
| 3 | Unbalanced magnetic force in permanent-magnet brushless machines with diametrically asymmetric phase windings显示文摘 | ZHU Z Q DAHAMAN I DAVID H | | 0，，06： | 1 |
| 4 | Unbalanced magnetic force in diametrically asymmetric phase windings 显示文摘 | Zhu Z Q Dahaman I David H | 2007 | IEEE permanent - magnet brushless machines Transac- tions on Industry Applications2007，43，6： | 1 |
| 5 | Eday--eurrent Loss in the Rotor Magnets of Permanent-Magnet Brushless Machines Havinga Fractional Number of Slots Per Pole显示文摘 | Dahaman Ishak Zhu Z Q David Howe | | 0，，09： | 1 |
| 6 | Transjugular Intrahepatic Portosystemic Shunt, Mechanical Aspiration Thrombectomy, and Direct Thrombolysis in the Treatment of Acute Portal and Superior Mesenteric Vein Thrombosis显示文摘 | Carlo Ferro Umberto G. Rossi Giulio Bovio M’Hamed Dahamane Monica Centanaro | 2007 | CardioVascular and Interventional Radiology2007，，5： | 1 |
| 7 | Eddy - current loss in therotor magnets of permanent - magnet brushless machines having afractional number of slots per pole显示文摘 | Dahaman Ishak Zhu Z Q David Howe | 2005 | IEEE Transactions on Mag-netics2005，41，9： | 1 |
| 8 | Transjugular Intrahepatic Portosystemic Shunt, Mechanical Aspiration Thrombectomy, and Direct Thrombolysis in the Treatment of Acute Portal and Superior Mesenteric Vein Thrombosis显示文摘 | Carlo Ferro Umberto G. Rossi Giulio Bovio M’Hamed Dahamane Monica Centanaro | 2007 | CardioVascular and Interventional Radiology2007，，5： | 1 |
| 9 | morph-ological aspects ofα″-Fe16 N2 precipitation inα-Fe显示文摘 | Ferguson P Dahaman U Westmacott K H | 1984 | Scripta Materialia1984，18，： | 1 |
| 10 | Eddy-current loss in the rotor magnets of permanent-magnet brushless machines having a fractional number of slots per pole显示文摘 | Dahaman Ishak Zhu Z Q David Howe | 2005 | IEEE Transactions on Magnetic2005，41，9： | 1 |
| 11 | Eddy-Current Loss in the Rotor Magnets of Permanent Magnet Brushless Machines Having a Fractional Num- ber of Slots Per Pole 显示文摘 | Dahaman Ishak Z Q Zhu | 2005 | IEEE Transactions on Magnetics2005，41，9： | 1 |
| 12 | Technical review of wind energy potential as small-scale power generation sources in Penang Island Malaysia显示文摘 | Tow Leong Tiang Dahaman Ishak | 2012 | Renewable and Sustainable Energy Reviews2012，，5： | 1 |
| 13 | Improved Control in Single Phase Inverter Grid-Tied PV System Using Modified PQ Theory显示文摘Grid-connected reactive-load compensation and harmonic control are becoming a central topic as photovoltaic(PV)grid-connected systems diversified.This research aims to produce a high-performance inverter with a fast dynamic response for accurate reference tracking and a low total har-monic distortion(THD)even under nonlinear load applications by improving its control scheme.The proposed system is expected to operate in both stand-alone mode and grid-connected mode.In stand-alone mode,the proposed controller supplies power to critical loads,alternatively during grid-connected mode provide excess energy to the utility.A modified variable step incremental conductance(VS-InCond)algorithm is designed to extract maximum power from PV.Whereas the proposed inverter controller is achieved by using a modified PQ theory with double-band hysteresis current controller(PQ-DBHCC)to produce a reference current based on a decomposition of a single-phase load current.The nonlinear rectifier loads often create significant distortion in the output voltage of single-phase inverters,due to excessive current harmonics in the grid.Therefore,the proposed method generates a close-loop reference current for the switching scheme,hence,minimizing the inverter voltage distortion caused by the excessive grid current harmonics.The simulation findings suggest the proposed control technique can effectively yield more than 97%of power conversion efficiency while suppressing the grid current THD by less than 2%and maintaining the unity power factor at the grid side.The efficacy of the proposed controller is simulated using MATLAB/Simulink. | Nur Fairuz Mohamed Yusof Dahaman Ishak Muhammad Ammirrul Atiqi Mohd Zainuri Muhammad Najwan Hamidi Zuhair Muhammed Alaas Mohamed Mostafa Ramadan Ahmed | 2023 | Intelligent Automation & Soft Computing2023，37，8： | 0 |
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