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International Transactions in Applied Sciences (ITAS)

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Author: Peeyush, Ritula Thakur,(Pages: 01-09)


Rural electrification may provide grid connectivity to many uncovered areas, but actual supply of electricity through the grid would remain both constrained and unpredictable as a result may still leave substantial numbers of remote areas unconnected. Micro Hydro project can generate power in decentralized and distributed mode which has the advantages of production at consumption points and does away with land and environmental related concerns and problems. Therefore a standalone autonomous unit to feed local consumers using micro hydro project is a preferred choice but this power generated is directly feed to the consumers if there is a variation in the load then it will affect the generator/turbine and other equipments connected to them. To solve this problem number of sophisticated control system are available in power application but they are expensive and inappropriate for micro hydro. One solution concept which is widely adopted is the electronic load controller. Load controller maintains the generator output voltage and frequency, irrespective of the amount of load connected to the generator. It does it by automatically dissipating any surplus power produced by the generator in additional load known as ballast load/dump load. This report focuses on steady state analysis of three phase alternator with electronic load controller (ELC). This steady state analysis includes stability and controllability of the system and simulation of the system in Simulink.



2 Two Warehouse Inventory Model with Variable Demand under Shortages

Author: Lalit Gupta, Shalini Jain, S.R. Singh,(Pages: 11-20)


In this study, a two warehouse inventory model for deteriorating items has been developed. We have taken a more realistic demand rate that depends on time. It is a very logical to consider the decay rate of items depends on time. A rented warehouse (RW) is used to store the excess units over the capacity of the own warehouse (OW). In addition, we are considering that the demand is stimulated by time and stock above a certain stock level. The competitive nature of the market has been accounted for by taking partial, time dependent, backlogging into consideration. The model is developed for a finite planning horizon, keeping in mind the short lifespan of the customer’s preferences. Finally, the results have been illustrated with the help of four numerical examples


Two warehouse, time dependent demand, deterioration

3 Two Storage Inventory Model for Deteriorating Items with Time and Stock Level Dependent Demand Rate

Author: Kulwant Singh Rana , S.R. Singh,(Pages: 21-33)


In this paper, we developed an inventory model by assuming demand rate as a function of time and stock level. The study shows that the optimal solution not only exists but unique also. The discounted cash flow and optimization framework are presented to derive the optimal replenishment policy that minimizes the total present value cost.


Inventory Model, Deteriorating Items, Time and Stock Level Dependent Demand Rate

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