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Monte Carlo (MC) sequential simulation is capable of providing system chronological information. It is a very useful tool for power system reliability analysis and planning, especially for systems involving time-dependent sources. In this paper, a new sequential simulation approach is proposed for reliability evaluation of composite power systems. The main idea is to apply Latin Hypercube sampling...
In this paper, a new concept of serving flexible reliability (FR) is introduced in distribution network level. FR is defined as the ability of a grid to continue servicing the high priority customers in contingency states. Customers' priority is recognized based on their value of service reliability. Regarding this matter, the philosophy of designing a hybrid AC-DC microgrid is introduced with the...
AC and DC (optimal) power flow is discussed and compared. The comparisons are done through two case studies, where the two power flow models are used in contingency and reliability analyses. It is shown that the two models can lead to quite different results. The problem related to the convergence difficulties with the AC power flow is also discussed.
Due to changes in the electric power system, small, distributed units substitute conventional power plants with regard to energy supply. This also holds for the provision of ancillary services. To this end, agents that represent units form coalitions. In this paper, a method is introduced to assess such coalitions with respect of how reliable they can provide ancillary services taking into account...
Reliability calculation programs for electrical power systems are available since the early 80s and have been since then continuously developed e.g. [1] [2]. However, these programs are designed for conventional power supply systems which consist of predominantly consumers. Through the development of electrical power systems in Europe and particularly the establishment of many new offshore wind farms,...
Relatively fewer studies exist in literature on including the complex effects of transmission protection system related failure dependencies in the reliability prediction models. Usage of extensive Markov models has been usually advocated to capture the impact of protection system reliability on power system reliability. A new analytical method which makes use of approximate methods of system reliability...
A new methodology is presented, allowing to evaluate protection systems reliability and availability indexes, taking into account equipment failure and repair rates. The protection scheme is translated into a reliability graph, enabling to identify all possible logical occurrences in the system, either meaning failure or successful operation. Evaluation of the system reliability and availability indexes...
The Itaipu Dam is a well-known hydroelectric plant located at the Paraná River, in the border between Brazil and Paraguay. With an installed capacity of 14GW, Itaipu is currently the world's largest electric energy generation plant and the second largest in terms of installed capacity, reaching in 2012 a total generation of 98.3TWh. This work proposes a probabilistic methodology based on sequential...
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