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The problem of real-time power balancing in a grid-connected microgrid is studied. We consider a microgrid powered by a conventional generator (CG) and multiple renewable generators (RGs) each co-located with one distributed storage (DS) unit. An aggregator operates the microgrid and aims to minimize the long-term system cost, including all RGs' cost, the CG's cost, and the cost for exploiting external...
This paper compares three types of technologies (Solar Chimney, CSP Tower, and PV farm) which produce electricity from the same source of energy: the Sun. It is treated for the Lebanese case and it compares the tariffs of each technology with the existing tariffs in Lebanon, the cost of each technology, and other parameters which are important to be considered while choosing any technology in order...
To determine the payments for delivered electricity and the power losses arising from the supply of electricity, the amount of electricity delivered from a power station to a certain consumer (reciprocal power) should be known. This to be realized requires tracing the flow of electricity. The superposition principle can be applied. The network is represented by generator nodes and consumer nodes connected...
Demand side management (DSM) has been studied to optimize the demand side of energy networks, which leads to maximization of social welfare. Methods of DSM usually require exchanges of true information used in the optimization process including private information, but in general market participants are not willing to reveal their private information. In a competitive society, each consumer's selfish...
We present an extension of a model predictive control approach for microgrid energy management. We take into account electricity costs, power consumption, generation profiles and power and energy constraints. Uncertainty due to variations in the environment (wind speed), failures and subsequent repairs of the generator, as well as battery lifespan limitations are taken into consideration. Simulation...
The DC House project started in 2010 which aims to provide an alternative solution to rural electrification, especially for geographically hard-to-reach areas. The DC House offers an individual or family-based as opposed to the community-based rural electrification. This makes the DC House solution scalable, affordable, and flexible. It does this by operating its components and system based on low-power,...
In Malaysia, Time of Use (ToU) pricing is applied on commercial and industrial electricity customers but not on residential customers. Residential pay a fixed/flat electricity price for every kWh they consumed disregarding the time of use. Many argued that imposing similar ToU pricing scheme on residential customers may only benefit the customers but not the utility since residential already consume...
Caribbean islands such as the Bahamas, Grenada and St. Lucia are affected yearly by seasonal hurricanes and tropical storms which can lead to blackouts and voltage variations of the power system. The Bahamas in particular consists of 16 isolated island grids which inhabits a population of 300,000. Diesel generators are employed to provide electricity for each island, but with increasing oil prices,...
Renewable energy generation will continue to increase in the future. To accommodate high renewable penetrations in power systems, solutions such as demand response, energy storage will be needed. Most of such studies need to combine with the load profile at domestic level, but resources of household load profiles are quite scarce. We propose a rule based domestic load profile generator which allows...
Load shedding is a very common phenomenon is Bangladesh. During summer, Gazipur experiences more than 15 hours of load shedding every day. This causes disruption in the academic works in IUT campus. The purpose of this paper is to analyse the cost optimisation of a PV-diesel hybrid energy generation system for IUT academic building, which can be used during load shedding. There are two models, one...
Microgrids integrate distributed energy resources to provide reliable, environment friendly and economic power to small/medium sized urban communities or to large rural areas. Due to the existence of generators at all levels of the distribution system and two distinct operating modes, i.e. grid connected and islanded modes, the fault currents in a system vary substantially. With appropriate relay...
As one of effective emergency control measures that are taken to keep the interconnected power grids from collapse caused by cascading failure, controlled splitting received broad recognition and approbation from engineering field and academic circle. The optimal controlled splitting problem is essentially an optimal graph splitting problem subjected to complicated topology constraints and large-scale,...
Bangladesh has the fastest growing rate of solar photovoltaic installation. Our main focus is on solar home system (SHS) and small solar home system (SSHS). These programs ensure access to clean electricity for the energy starved off-grid rural areas of Bangladesh and supplement the Government's vision of ensuring ‘Access to Electricity for All’ by 2021. But rural markets/bazaar need energy and their...
Isolated and small electricity consumption locations such as Islands are not providing enough foundation for grid extensions to deliver electricity to the localities. Therefore, most of the Islands are using stand-alone generators to deliver power to the consumers. However, this not only increases the cost of energy generation but also increases the threat of global warming and makes them susceptible...
Australia, like other industrial and emerging economies, is faced garbling with the challenge of reducing its greenhouse gas (GHG) emissions. Electricity generation is Australia's largest source of GHG emissions [1]. Power usage increases on hot summer days in Australia in general and in Victoria and South Australia in particular where it peaks around 6–7pm. To meet future growth in electricity consumption...
The increasing interest in space exploration, satellite activities, structural health monitoring and terrestrial monitoring in harsh and inaccessible environments place a high demand for energy sources for autonomous systems. The existing battery technologies that can be utilized for autonomous systems are plagued by short-life, low energy storage density, associated unwanted maintenance burdens of...
With increase involvement of multi-technologies, such as new/renewable energy sources, energy storages, microgrid and distributed energy systems, combined heating and power(CHP) systems have been brought more new features. And incurred complex energy management strategies or optimal algorithms for multi energy sources system are required.This study was to develop a optimal energy management algorithm...
Uniform marginal prices cannot generally support competitive equilibrium solutions in markets with non-convexities and yield schedules' inconsistency and surplus sub-optimality effects. Previous work has identified non-convexities associated with the generation side of electricity markets and proposed a generalized uplift approach to eliminate these effects. This paper examines the above issues from...
Immense growth has happened in the field of microgrid (MG) and the energy management system (EMS) methods in the past decade. It is estimated that there is still a huge potential of growth remaining in the field of EMS in the coming years. The main role of EMS is to autonomously determine hour-by-hour the optimum dispatch of MG and main grid energy to satisfy load demand needs. This paper is focused...
A high-level supervisory controller is developed for a Compressed Air Energy Storage (CAES) system integrated with a wind turbine. Complementary to the low-level controllers in our previous works to track generator power and pressure, this controller coordinates different subsystems to optimize the system performance. The control strategy is obtained by solving an optimal storage/regeneration problem...
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