With the increased environmental concern, the photovoltaic (PV) generation capacity is growing in today's power systems. As the PV penetration rate increases, the intermittency and uncertainty of PV ...systems will cause frequency regulation issues. When rapid fluctuations take place, the system requires fast responding regulation to recover the frequency within a short period of time. Traditional power plants with slow dynamics are less capable of tracking the fast-changing regulation signal. In this context, a battery energy storage system (BESS) is considered as an effective regulation source to respond immediately to frequency deviations. This paper addresses the sizing issue of an aggregated BESS by a series of system level performance tests with different BESS penetration rates. The evaluation criteria are the control performance standards 1 and 2. Response effectiveness of the BESS with different levels of disturbances is also analyzed, with comparison to that of the traditional power plants. The proposed BESS aggregation controller is also validated using software simulations and a hardware testbed.
In this paper, we address the issue of valuating distributed energy resources (DERs) as non-wires alternatives (NWAs) against wires investments in the traditional distribution network planning ...process. Motivated by the recent literature on distribution locational marginal prices, we propose a framework that allows the planner to identify rigorously the short-term locational marginal value (LMV) of DERs using the notion of marginal cost of capacity (MCC) of the best grid investment alternative to monetize hourly network constraint violations encountered during a yearly rate base timescale. We apply our methodology on two actual distribution feeders anticipated to experience overloads in the absence of additional DERs, and present numerical results on desirable LMV-based generic DER adoption targets and associated costs that can offset or delay different types of grid wires investments. We close with a discussion on policy and actual DER adoption implementation.
Energy storage is a novel technology with perceived performance and lifecycle risks. In addition, there are many different business/regulatory paradigms for investors in storage resources based on ...existing business models for electric power assets today. At the heart of designing storage applications for best cost-benefit results and for evaluating storage economics of particular applications is the way different business models realize direct monetized benefits and indirect avoided costs from energy storage. This paper unpacks the complexities of deploying and operating energy storage and identifies any potential barriers to participation in storage. It lays out some of the existing and hypothetical business models for the investment in and operation of electric storage, and explores the complexities and possibilities of these business models when storage is bucketed" as a generation, transmission, distribution, or customer asset. It also identifies possible policy recommendations and areas for further analysis, including some alternative models that consider storage as a unique asset class that offers services offered by other assets today.
The articles in this special issue focus on the applications and use of energy storage products and services and assesses their economic value for the power system supply industry.
The articles in this special issue focuses on energy storage technologies, with particular emphasis on batteries and energy conversion technologies and applications.
Massachusetts Institute of Technology. Dept. of Electrical Engineering. Thesis. 1969. M.S.
Bibliography: leaf 89.
Massachusetts Institute of Technology. Dept. of Electrical Engineering. Thesis. 1969. ...M.S.
The articles in this special issue focus on the applications and use of energy storage products and services and assesses their economic value for the power system supply industry.
With the increased environmental concern, the photovoltaic (PV) generation capacity is growing in today's power systems. As the PV penetration rate increases, the intermittency and uncertainty of PV ...systems will cause frequency regulation issues. When rapid fluctuations take place, the system requires fast responding regulation to recover the frequency within a short period of time. Traditional power plants with slow dynamics are less capable of tracking the fast-changing regulation signal. In this context, a battery energy storage system (BESS) is considered as an effective regulation source to respond immediately to frequency deviations. This paper addresses the sizing issue of an aggregated BESS by a series of system level performance tests with different BESS penetration rates. The evaluation criteria are the control performance standards 1 and 2. Response effectiveness of the BESS with different levels of disturbances is also analyzed, with comparison to that of the traditional power plants. The proposed BESS aggregation controller is also validated using software simulations and a hardware testbed.
Electric power restructuring means that energy management systems (EMS) will have to work and work well-but can existing technologies and the industry infrastructure meet the challenge? The author ...answers this question by looking at accountability and accounting, tracking of power exchanges, data archiving of system operation for billing, and the EMS market and its problems and successes.
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