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Summary form only given: The introduction of distributed generation (DG) is leading to a fundamental change in how distribution networks are utilised and viewed. Distribution networks are now used as a means to connect geographically dispersed energy sources to the electricity system, thereby converting what were originally energy delivery networks, to networks used both for the delivery and harvesting...
Summary form only given. This paper presents some application studies of the dynamic solid oxide fuel cell (SOFC) model developed by the authors. First, the model is used to investigate the short-time overloading capability of the SOFC. Then, the application of the model in distributed generation (DG) system studies is explored. Controller design methodologies are also presented for grid-connected...
Summary form only given. Anti-islanding protection of distributed generators (DG) is a significant technical barrier to the emerging DG industry. This paper presents an innovative power line signaling based anti-islanding scheme developed in response to the challenge. The scheme broadcasts a signal from a substation to the DG sites using the distribution feeders as the signal paths. A DG is considered...
Summary form only given: Anti-islanding protection of distributed generators (DG) is a significant technical barrier to the emerging DG industry. In response to this challenge, a power line signaling based anti-islanding protection scheme has been proposed in a companion paper. The scheme broadcasts a signal from a substation to the DG sites using the distribution feeders as signal paths. A DG is...
Summary form only given. The radial distribution feeder protection strategy is first presented in the paper without consideration for DG. Then, the addition of DG across the feeder (constrained in terms of power and/or energy capacity) is introduced in the model. If islanded operation of these DG sources is allowed on a feeder subjected to a disturbance, DG may reduce the number of interruptions and/or...
Thermophotovoltaic (TPV) systems are designed to produce direct-current electrical energy via high-temperature semiconductors receiving radiant energy from the combustion of fuel. Unique system elements and design are required to maximize the transfer of energy from the flame to a radiator to the receiving cells and cooling apparatus. The new concept of a micron-gap TPV system (MTPV) is also discussed...
The expected insertion of DG (distributed generation) in the distribution networks entailed by environmental, regulation and economical aspects will modify the way the entire system is planned and operated. Due to its dispersed nature, DG will require more flexible operated system. This situation will emerge through various applications and developments of the distribution automation. In addition,...
This paper will present an update of the work presently being done by a range of organizations in the area of policy, technology and practices for interconnection of various types of distributed generation (DG) systems to the utility distribution network grids. We will present a description of a new initiative being sponsored by the Massachusetts Technology Collaborative's (MTC) DG Collaborative for...
In European member states renewables-based electricity generation (RES-E) and co-generation of electricity and heat (CHP) are eligible for typically technology-specific MS support schemes. This drives the growth of distributed generation (DG) - this are generators connected to the electricity distribution grid - to significant levels. Most member states implemented specific regulation to allocate...
Effective integration of distributed generation (DG) in distribution networks can be stimulated by providing adequate economic signals to inform DG developers and operators about the preferable locations and the value of DG in the context of providing network flow control services and deferring network reinforcement. DG which contributes positively in the reduction of network investment cost should...
The development of the fuel and gas industry, its movement towards international market arena and gradual change of economy sectors towards market conditions contribute to dynamic improvement and development of economy of the Republic of Azerbaijan. Under present condition the demand for electricity outstrips power supply capacity. At least 5 regions of the republic have consumers located far away...
Distributed generation has the potential to reduce equipment loading on distribution feeders, which can potentially eliminate capacity constraints that would otherwise prevent load transfers between feeders. This paper investigates this reliability aspect of distributed generation by examining the reliability of a test system for three different load duration curves representative of residential loading,...
Including distributed generation (DG) in distribution systems often requires in-depth analysis and planning. This panel paper will present a few issues related to the planning of distributed generation, and will describe how intelligent systems methods can be used to help solve these issues. Investment and operating cost minimization, capacity determination and siting of distributed generators, islanding...
This paper presents a study about the impact of different inverter interface controls on the steady-state stability of inverter-based distributed generators (DG) in the presence of positive feedback anti-islanding schemes. The impact of the constant power controller and the constant current controller on the DG system steady-state stability is compared. The Sandia frequency shift (SFS) anti-islanding...
This paper describes an automated, distributed approach to controlling, operating, and managing electric power within a microgrid. Operation in the context of an external primary power grid is considered. We wish to construct a system that will allow us to state and enforce an energy policy that captures what we want the system to do under various conditions, including light and full duty cycles with...
With a rapid increase of dispersed generation (DG) like wind power etc. in Japan and around the world, there is a growing need for distributed energy integration (DEI) in the power grid as a reliable and a responsible source. In accomplishing this task, a number of underlying technical challenges need to be addressed successfully. In finding solutions to such technical issues, the role of simulation...
This paper describes the application of an SCR-based static switch, located at the point of common coupling (PCC), in a designed microgrid, which incorporates a high level system control scheme to maintain compliance with IEEE Standard 1547. In this application distributed resource equipment, which may be considered non-compliant, has been uniquely applied beyond the static switch to increase reliability,...
The increasing diffusion of dispersed generation (DG) offers many benefits to the electric system, such as the better exploitation of the renewable energy potentials and higher efficiency in conversion from primary energy sources. However, the technical challenges for a fully functional and efficient DG-based development of the electric system are still many. One of the main problems is related to...
This paper describes field testing of the CERTS Microgrid concepts in an actual hardware installation. The test setup, including hardware that incorporates the CERTS controls, is installed at American Electric Power's Walnut Test Site, near the AEP Dolan Test Center. The results of a variety of tests that cover different scenarios of step load changes and transitions from utility-tied to islanded...
Customers in liberalized energy markets do not have tools in hand to contribute to the balancing of undispatchable distributed generation and the uncontrolled loads. This paper discusses how an activation of the loads could make users more involved in energy markets and indirectly support the sustainable deployment of distributed generation often based on locally available renewable energy sources...
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