A Novel Architecture for Data Management and Control in Autonomous Intelligent Microgrid

AbstractIntelligent microgrid with distributed energy sources is considered as the next generation grid to mitigate the present day power system issues. Intelligent microgrid should facilitate monitoring and distributed control of the system using smart components. For effective, reliable and intelligent operation of such a system, it needs to use the advanced communication and intelligent information processing techniques. This paper explores the possibility of managing an autonomous intelligent microgrid with prioritized loads, utilizing the existing communication networks to acquire data and manage from a central location. The central control center runs an energy management algorithm, utilizing the load and source data acquired from the clients, to maximize the power delivery to the higher priority loads. The proposed scheme enables the consumers to dynamically set their load priority and fix the rate for selling the power generated by them within the autonomous grid, thereby ensuring consumer participation in the development of power infrastructure. Further, a load management algorithm for the reliable operation of autonomous intelligent microgrid with prioritized loads is proposed and its effectiveness is illustrated with a case study

Heterosis analysis in relation to drought tolerance in rice land races and their genotypes

An experiment was conducted in rice to study the heterosis for drought tolerance and grain yield in 24 hybrids developed from six landraces viz., Kallurundaikar, Kuliadichan, Kuruvaikalangiam, Mattaikar, Nootripathu and Vellaichithiraikar used as lines and four high yielding varieties viz., PMK 3, MDU 5, ASD 16 and ADT 36 used as testers for physio-morphological traits by Line x tester analysis. The experimental results revealed that the hybrids viz., Nootripathu / MDU 5, which had significant standard heterosis for eight characters namely days to 50% flowering, plant height, productive tillers, root length, root dry weight, root : shoot ratio, harvest index and grain yield per plant, Nootripathu / PMK 3 exhibited significant standard heterosis for seven characters namely plant height, root length, root dry weight, root : shoot ratio, 100 grain weight, harvest index, and grain yield per plant were found to be superior hybrids over the standard check variety PMK 3. High proline content which is an index for drought tolerance was recorded in hybrid Kuruvaikalangiam / ADT 36 (11.94%) exhibited significant standard heterosis which is found to be drought tolerant among the hybrids

A k-out-of-n reliability system with an unreliable server and phase type repairs and services: the (N, T) policy

In this paper we study a k-out-of-n reliability system in which a single unreliable server maintains n identical components. The reliability system is studied under the (N,T) policy. An idle server takes a vacation for a random amount of time T and then attends to any failed component waiting in line upon completion of the vacation. The vacationing server is recalled instantaneously upon the failure of the Nth component. The failure times of the components are assumed to follow an exponential distribution. The server is subject to failure with failure times exponentially distributed. Repair times of the component, fixing times of the server, and vacationing times of the server are assumed to be of phase type. Using matrix-analytic methods we perform steady state analysis of this model. Time spent by a failed component in service, total time in the repair facility, vacation time of the server, non-vacation time of the server, and time until failure of the system are all shown to be of phase type. Several performance measures are evaluated. Illustrative numerical examples are presented

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Not AvailableA laboratory experiment was conducted to study the response of 45 castor genotypes to drought stress. Five water stress levels were used. The experiment was laid out by complete randomized design with two replications. Ten seeds of each accession were sown in sterilized sand medium and the Poly Ethylene Glycol solution was given to medium. On the tenth day, the observations were recorded. Seedling length, root length and germination percentage were observed. The highest tolerance for germination was shown by RG 2474. The values of shoot length were higher in RG 2474. The maximum root length was seen in RG 2326 and RG 3013.Not Availabl

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Transforming distribution system into a sustainable isolatedmicrogrid considering contingency

Currently, the distribution system has been adapted to include a variety of Distributed Energy Resources (DERs). Maximum benefits can be extracted from the distribution system with high penetration of DERs by transforming it into a sustainable, isolated microgrid. The key aspects to be addressed for this transformation are the determination of the slack bus and assurance of reliable supply to the prioritized loads even during contingency. This paper explores the possibilities of transforming the existing distribution system into a sustainable isolated net-work by determining the slack bus and the optimal locations and capacity of Distributed Generators (DGs) in the isolated network, taking into account the contingencies due to faults in the network. A combined sensitivity index is formulated to determine the most sensitive buses for DG placement. Further, the reliability based on the loss of load in the isolated system when a fault occurs is evaluated, and the modifications required in for reliability improvement are discussed. The supremacy of the transformed isolated network with distributed generators is comprehended by comparing the results from conventional IEEE 33-bus grid connected test system and modified IEEE 33-bus isolated test system having no interconnection with the main grid

A new species and a key to species of Anteromorpha Dodd (Hymenoptera: Scelionidae) of India

Anteromorpha malabarica Narertdran sp. nov. comes near A.deccanensis Sharma in general appearance but differs from it in having lateral ocelli contiguous with eye border and T1 with nump or module in middle base. A key to species of Anteromorpha is provided

Utility of Ahara Matra w.r.t. Ashta Ahara Vidhi Vishesha Ayatanani

Ahara Matra is the quantity of food to be taken and Matravat Ahara is the proper quantity of food to be taken. Ashta Ahara Vidhi Vishesha Ayatanani are the factors considered before taking the food for maintaining health. Utility of Ahara Matra and its relation with these factors have much importance in current scenario. By understanding Ahara Matra in relation with these factors, we can easily maintain health Objective: This paper aims to understand the concept of Ahara Matra, establish the relationship of Ahara Matra with Ashta Ahara Vidhi Vishesha Ayatanani and its application of Matravat Ahara. Data Source: Literature review was carried in classical texts and various databases. Total 38 articles were found and are reviewed. Result: This paper clarifies relationship between Ahara Matra and Ashta Ahara Vidhi Vishesha Ayatanani and various utilities of Ahara Matra. Conclusion: By understanding these factors related, one can calculate the amount of food to be taken and can maintain health