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This paper presents an extended impedance-based fault location formulation for unbalanced distributed generation systems. In recent years, distributed generation has become an efficient and economical alternative to produce energy. However, the high penetration of distributed generators changes the magnitude and direction of the fault currents affecting the accuracy of impedance-based fault location...
Wind generation is traditionally treated as a non-dispatchable resource and is fully absorbed unless there are security issues. To tackle the operational reliability issues caused by the volatile and non-dispatchable wind generation, many dispatch frameworks have been proposed, including robust unit commitment (RUC) considering wind variation. One of the drawbacks that commonly exist in those dispatch...
This paper models the the reserve capacity procurement problem in Denmark to account for the sequential clearing of the reserve availability market and the energy market, and the forecast error of system wind power and demand. The problem is modeled as a stochastic mixed-integer bilevel linearing programming problem. A real case of Western Denmark is studied. In the case analyzed, the EENS induced...
In this paper, we build a framework to assess climate-change impacts on a power system. In order to appropriately capture the uncertainty of the climate change's multi-dimensional impacts, we argue that the multiple representative scenarios need to be set. Therefore, we developed a data-driven method to select representative scenarios instead of using the random-sampling method. We explain why the...
Power system protection and emergency control systems require continuous monitoring to prevent grid-wide frequency instability or system islanding. Amongst different methods, cellular computation networks (CCNs) are more suitable for providing dynamic frequency predictions. CCN is a scalable and distributed framework using the concept of cells and intercellular connections to represent a power system...
Pulsed power loads such as electromagnetic guns, electron lasers, high-power radars, electromagnetic launch and recovery systems can cause significant stress on aircraft electric power systems. In this paper, the performance characteristics of a fully integrated advanced aircraft electric power system (AAEPS) with a hybrid fuel cell-battery auxiliary power unit and connected pulsed power loads are...
This paper reviews various schemes utilized for generating electric power from renewable energy resources, which are suitable for interconnecting with a power grid as well as for using as an isolated system. As all the renewable energy resources except geothermal energy, being climate dependent, the power generated from them is of varying magnitude-even sometimes no power is generated at all. The...
In the recent past factors such as apprehensions over impacts of environmental aspects, distribution network improvement conditions, and other subsidised programs of the government have affected the distributed generators (DG) units count in commercial and domestic electrical power output. It is known that the optimal size and optimal placement of DG units may lead to low power losses, high voltage...
With increasing size and unit capacity of photo-voltaic power generation, the impacts of photovoltaic generation on the power system have become increasingly prominent. This paper presents one methodology to evaluate the impact of photo-voltaic generation in the random production simulation. The algorithms used to solve probabilistic production simulation is equivalent energy function method. Which...
The European Union continues to exert a large influence on the direction of member states energy policy. The 2020 targets for renewable energy integration have had significant impact on the operation of current power systems, forcing a rapid change from fossil fuel dominated systems to those with high levels of renewable power. Additionally, the overarching aim of an internal energy market throughout...
The purpose of this paper is to determine the characteristics of properly functioning capacity remuneration mechanism, analyze the inefficiency of most popular mechanisms, and propose the novel concept of effective and controllable subsidy. The proposed mechanism guarantees differentiated remuneration depending on the technologies' contribution to the power system. It rewards higher the technologies...
Demand Response integration into an intelligent power system brings the consumers several advantages, not just in terms of lower energy tariffs, but also the benefit of monetary incentives for their participation. In this paper, an aggregator proceeds to perform the resources scheduling in order to reduce operational costs. After the scheduling, three reduction levels are applied to the most expensive...
This paper investigates the value of nodal information of power systems in real-time. It is a fact that real-time security assessment of the power system requires nodal scheduling information of generating units, however, the value of this information from a market aspect is seldom discussed. In other words, precise schedules help the system operator not only assess the system security, but also estimate...
The present paper presents an analytical model for the evaluation of short-term frequency response in isolated power grids with increasing penetration of renewable energy sources. The analysis includes synthetic inertia and primary frequency control schemes proposed in the literature for wind power plants. Thus, frequency response in future insular scenarios can be estimated. The analytical model...
In this paper we show how to build an economically optimal feedback control strategy for the re-dispatch of electricity generation. We assume that the operator steers production in a set of controllable power plants by altering the active power set-point of each generator, within a set of predefined set-points. The operators strategy will be based on balancing the operating cost against the expected...
Deregulation of energy market led to the development of flexible and efficient framework for energy trading by energy companies in a competitive environment. Both deregulation and the concern towards environment issues increased the number of small and medium renewable power plants distributed in the network. The variability of renewable energy sources and the lack of their central monitoring led...
Traditionally, the Icelandic, island, hydro-based power system has been scheduled and planned based on local, isolated demand of two types: General Demand (GD) and the flat, now dominating Energy Intensive Industry (EII) demand. Thus a local load profile determines the scheduled operation, perhaps causing underutilization of resources, and water spillage. This limited flexibility is built into an...
Currently, Non-Programmable Renewable Energy Source (NPRES) generation contributes significantly to demand supply, but participation to ancillary services is still limited to emergency support (e. g. curtailment of energy production in case of over-generation, fast active power reduction in case of large over-frequency transients). Battery Energy Storage Systems (BESSs) can be employed to support...
Wind power generation is increasingly gaining popularity around the world and in the Philippines, with its economic and environmental benefits. However, its intermittent nature poses a problem on power system adequacy, the effects of which must be quantified for reliable system operation and proper expansion planning. The Effective Load Carry Capability (ELCC) is one such metric that can quantify...
This paper solves an optimization problem to minimize the emission due to carbon oxides, nitrogen oxides and sulfur oxides with cost as a constraint for a wind-solar-thermal power system. Wind and solar energy can reach significant penetration in modern power system and they will introduce additional uncertainties. Market price is mainly influenced by the generating fuel cost, as the wind and solar...
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