Proposal and Execution of PLC based Controller for AC Coaches in Indian Railway

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In this research paper the main concern is to develop a design process of PLC based controller for AC coaches in railway vehicles. Passengers travelling in railway are severely affected by penetration of air unpleasantly burdened with dust due to open windows. Considering a situation that a train travelling from Kanyakumari to Kashmir over 3715 kilometer should cross different atmospheric climatic conditions. In the recent report they says delhi is highly polluted state in the year 2021 due to this environment air is highly affected in this case the railway vehicle is crossing over a kilometer in the polluted place the atmosphere air will circulated inside the vehicle. In AC coach it may give advers effect to the passengers while inhealing the air it may affect the human lungs. Another is that humid country like India, the temperature level is varied from -10°C to 47°C based on the seasonal changes. In summer season AC of railway is, therefore, essential for the highest comfort and safety journey for the passengers. Hence, to satisfy the needs of the passengers Indian railway takes more attention in renovation and implementation of modern technology in controlling through automation. However the passenger requires consistent temperature inside the coach irrespective of the outside temperature. This entire air-conditioning system is controlled by mechanical relay contacts over three decades. This system has some demerits like malfunction of relay contact, system failure, wiring complexity. To overcome this problem a PLC based novel technology have been designed and implemented in railway AC coaches and a simulation model is also designed by using PLC software and the results are verified.