Topic
Stand-alone power system
About: Stand-alone power system is a research topic. Over the lifetime, 8650 publications have been published within this topic receiving 192397 citations. The topic is also known as: Stand-alone photovoltaic power system.
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TL;DR: In this paper, power managements of a UAV's hybrid electric propulsion systems are described, and two types of power control logics are investigated: passive and active power management, respectively.
Abstract: Power managements of a UAV’s hybrid electric propulsion systems are described. Three electric propulsion systems with different power sources, i.e. solar cells, fuel cells, and batteries are considered. Each power source is modeled in Matlab/Simulink and integrated into the power system. For fuel cells and batteries, the simulation process is verified via comparison between the simulation results and available flight test results of UAVs. Two types of power control logics are investigated: passive and active. The passive power management simulation shows that the behavior of each power source and its integrated system is adequate for the overall flight envelope. In addition, the active power management simulation demonstrates that active power management yields more efficient power distribution and better system safety than passive power management does. Also, a power simulation of a hybrid electric power system allows for estimation of the output behavior of the power source. Therefore, it can be a valuable tool for development of a power control logic that ensures efficient power distribution.
66 citations
TL;DR: In this paper, the optimal design of a biogas fuelled power generation system considering thermodynamic and economic objective functions is considered. And the Pareto front relating maximum efficiencies and minimum unit cost of electricity is obtained.
66 citations
TL;DR: In this paper, a pump-as-turbine (PAT) power generator for small-scale micro-hydro and energy recovery systems is presented. But the implementation of a PAT is highly problematic in terms of predicting the installed best operating point coupled with poor off-design performance due to the fixed geometry and absence of inlet flow control.
66 citations
TL;DR: In this paper, the use of residential lead-acid energy storage coupled with photovoltaics and its possible interaction with the grid for different limits of feed-in power without any support policies was analyzed.
66 citations
TL;DR: In this article, the authors proposed that energy storage can bring significant, fundamental economic benefits to various areas in the electric power sector, including reduced investment requirements for generation, transmission, and distribution infrastructure as well as reduced system operation and balancing costs.
Abstract: Any Cost-effective transition toward low-carbon electricity supply will necessitate improved system flexibility to address the challenges of increased balancing requirements and degradation in asset use. Energy storage (ES) represents a flexible option that can bring significant, fundamental economic benefits to various areas in the electric power sector, including reduced investment requirements for generation, transmission, and distribution infrastructure as well as reduced system operation and balancing costs. The additional flexibility offered by ES could also significantly reduce the requirement for investment in low-carbon generation capacity while achieving the established carbon intensity targets. Moreover, ES may present significant option value, as it can provide flexibility for dealing with uncertainty in future system development.
66 citations