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In the last decade increasing concerns about the environment, financial reasons based on fuel prices and application-specific operational challenges have been driving the development of electric propulsion and hybrid or full-electric ships. The use of battery energy storage systems (BESS), which are suitable for a broad range of ship applications with different requirements, can reduce the use of...
Over the last decade the use of battery energy storage systems (BESS) on different applications, such as smart grid and electric vehicles, has been increasing rapidly. Therefore, the development of an electrical model of a battery, capable to estimate the states and the parameters of a battery during lifetime is of critical importance. To increase the lifetime, safety and energy usage, appropriate...
This paper describes a model-based evaluation analysis of grid connected Energy Storage Systems (ESS) that provide a set of grid services: energy arbitrage, distribution investment deferral and frequency regulation. The purpose of this evaluation is to determine the most profitable way to operate an ESS among different investment scenarios and dispatch schedules. Depending on the selected operational...
This paper compares three different methods to limit the active power gradient of a renewable energy plant. The methods are based on the utilization of an Energy Storage System (ESS) to absorb and release power required in the case of fast power ramp-up or ramp-down, respectively. The paper presents analytical solutions for the required energy storage capacity in case of an ideal ramp event, using...
Intermittent renewable energy sources have drawn much attention in the last 15 years. The European network infrastructure is changing towards more renewables, increasing the usage of co-generation while decreasing the capacity for conventional power plants (20-20-20 Energy Policy). However, these renewable sources have outputs which are characterized by poor controllability and unpredictability, thus...
This paper describes the research that has been conducted as a part of a pilot project commissioned by Falbygdens Energi in the Falköping distribution network consisting of a battery energy storage system. The main overall project setup, main components and their relation to the performance of the system as well as the control system have been analysed. Practical measurements and the impact of the...
In a typical single-phase battery energy storage system, the battery is subject to current ripple at twice the grid frequency. Adverse effects of such a ripple on the battery performance and lifetime would motivate modifications to the design of the converter interfacing the battery to the grid. This paper presents the results of an experimental study on the effect of such a current ripple on the...
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