This paper explores the feasibility of supplying electrical power to modern homes using a DC voltage mains within the house. A bottom-up approach is adopted in the design of the DC supply, starting with known domestic loads to build a... more
This paper explores the feasibility of supplying electrical power to modern homes using a DC voltage mains within the house. A bottom-up approach is adopted in the design of the DC supply, starting with known domestic loads to build a power usage profile based on assumed lifestyle for the occupants of the house. The load profile is then used to work out cable sizes for the mains distribution network. It looks at the type of electrical cables to be employed and the calculations involved in working out voltage drops, and therefore power loss along the cables. The voltage used in the calculations, was 24 V, as this is the voltage rating of DC appliances and devices. The methodology is then employed with a range of powers and voltages to work out different possible load and cable scenarios. The constraints to the analysis and further work are discussed. Economic analysis is carried out on energy losses, and the advantage of using DC appliances, as against using AC appliances is discussed. The goal is to build a framework that will provide the necessary tools that will help in identifying an optimal voltage for the low powered DC home. Previous work is looked at.
The paper presents a digital simulation and validation study of an error driven tri-loop Fuzzy Logic Controller FLC with motor load current limiting loop for a hybrid photovoltaic PV farm utilization with an alternative power source for... more
The paper presents a digital simulation and validation study of an error driven tri-loop Fuzzy Logic Controller FLC with motor load current limiting loop for a hybrid photovoltaic PV farm utilization with an alternative power source for DC type loads. A three loop dynamic error driven fuzzy logic controller is designed and validated for the control of the required power transfer to the composite DC-load under normal as well as abnormal disturbance based excursions and changes. The basic characteristic of the FLC controller is the catering to any nonlinear Load Inertia and Damping J, B as well as sudden load torque excursions and surges. The proposed control function is digitally simulated using the MATLAB/Simulink/SimPower System software environment. The dynamic performance of the unified green energy PV-DC utilization system is fully examined for the control system validation under normal and abnormal operating conditions.
