POWER FACTOR CORRECTION AND VOLTAGE STABILITY IMPROVEMENT BY USING UPQC

M.Praveenkumar¹, D.Saravanakumar², K.Suresh kumar³, P.Pavunraj⁴

^{1 2 3}UG student- Department of EEE – Vickram College of Engineering, Enathi Tamilnadu, India.

⁴Assistant Professor - Department of EEE – Vickram College of Engineering, Enathi Tamilnadu, India.

Power Quality (PQ) has become an important issue to electricity consumers at all levels of usage. Power Quality is defined any abnormal behavior on a power system arising in the form of voltage, current and frequency deviations, which affects the normal operation of electrical or electronic equipment.  Power quality is related to the ability of utilities to provide electric power without interruption. One of the major concerns in electric industry today is power quality problem to sensitive loads. The change of Voltage, current, frequency is leads to Power quality events such as over voltage, under voltage, voltage sag, voltage swell, harmonic distortion, unbalance, transient and flicker may have impact on customer devices, cause malfunctions and also cost on loss of production.Unified Power Quality Conditioner (UPQC) is a series converter and shunt converter connected back to back through dc link in the power system. It protects the consumer at the load end from overvoltage, under voltage, voltage sag/swell and also provides unity power factor condition at the utility for different values of load. The main objective of this paper is to regulate the voltage at source side against any power quality issues like under voltages, over voltages, sag, swell, flicker and etc. The Total Harmonic Distortion (THD) was reduced and Power Factor was improved by using UPQC.

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ANALYSIS OF FACTORS AFFECTING SAFETY MANAGEMENT FOR METRO CONSTRUCTION IN INDIA

P. Mohan ¹, R. Vel Kennedy ²

¹PG student- Department of Civil - Thiagarajar College of Engineering, Madurai, Tamilnadu, India.

²Assistant Professor - Department of Civil - Thiagarajar College of Engineering, Madurai, Tamilnadu, India.

                Indian cities are recording fast growth in all aspects due to rapid urbanization.  Hence number and size of metro construction projects are increasing rapidly in India. Meanwhile; a disturbing lime light is being shed on an increase in number of accidents by the society. Safety management in construction industry in India is not very effective when compared to other countries. This results in indirect financial loss, cost overruns and loss in production for the companies. In order to improve safety management by identification of unsafe factors were examined. Further a weighing system will be built for their classification. The factors that cause safety hazard for each type of work are estimated based on their frequency and severity. An investigation of the participant’s perspectives on the factors affecting safety in metro construction has been conducted to identify the key safety factors, and their ranking. Also the consistency of responses among the main participants including clients, consultants, designers, contractors, supervisors and safety engineer has been evaluated. Suggestion and recommendations on practical counter measures to improve metro construction safety management in India are proposed. This research has utilized focus groups and detailed study of accidents in metro construction activities. An Ergonomic system approach has been handled to identify the critical area where safety is compromised.

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FINEST MESSAGE DOWNLOAD IN VEHICULAR NETWORK

N.Muthazhaki ¹, R.Akilandeswari ²

¹PG Student STET Women’s college, mannargudi

²Professor of CS department, STET Women’s college, mannargudi

            A vehicular network uses cars as mobile nodes in a MANET to create a mobile network. It  turns every participating car into a wireless router or node, allowing cars approximately 100 to 300 metres of each other to connect and, in turn, create a network  with a wide range.  A content downloading system leveraging both infrastructure-to-vehicle and vehicle-to-vehicle communication. This captures many of the infotainment services that vechicular communication is to enable, include news report, navigation maps, and multimedia file downloading. This content downloading system will induce the vehicular user to use the resource to the same extent as today’s mobile customers. Its goal is to maximize the system throughput, So we formulate a max-flow problem for several practical aspects, including channel contention and the data transfer paradigm. The existence of Internet-connected navigation and infotainment systems is becoming a truth that will easily lead to a remarkable growth in bandwidth demand by in-vehicle users.  Our approach allows us to investigate the impact of different factors, such as the roadside infrastructure deployment, the vehicle-to-vehicle relaying, and the penetration rate of the communication technology, even in presence of large instances of the problem. The results highlight the existence of two operational regimes at different penetration rates and the importance of an efficient, vehicle-to-vehicle relaying.

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BUYING THE CACHE IN CLOUD

B.Keerthana ¹, N.Subhalakshmi ²

¹PG Student STET Women’s college, mannargudi

²Professor of CS department, STET Women’s college, mannargudi

            Cloud computing is a general term for the delivery of hosted services over the Internet. Cloud computing enables companies to consume compute as a utility – similar to electricity or a telephone service – rather than building and maintaining computing infrastructures. The practice of using a network of remote servers hosted on the Internet to store, manage, and process data, rather than a local server or a personal computer the cloud. Cache as a service (CaaS) model is an additional service to Infrastructure as a service (IaaS). The cloud server process introduce, pricing model together with the elastic cache system. This will increase the disk I/O performance of the IaaS, and it will reduce the usage of the physical machines. The emerging cloud applications provide data management services allowing the user to query the cloud data, paying the price for the infrastructure they use. A virtual machine (VM) is a typical instance of IaaS. Although a VM as an isolated computing platform which is capable of running multiple applications, it is assumed in this study to be solely dedicated to a single application; and thus, we use the expressions VM and application interchangeably hereafter. Cloud services as virtualized entities are essentially elastic making an illusion of “unlimited” resource capacity. This elasticity with utility computing (i.e., pay-as-you-go pricing) inherently brings cost effectiveness that is the primary driving force behind the cloud. Caching technology improves the performance.

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HIGHLY SCALABLE KEY PRE DISTRIBUTION SCHEME FOR WIRELESS SENSOR NETWORKS

R.Saranya ¹, S.Mekala ²

¹PG Student STET Women’s college, mannargudi

²Professor of CS department, STET Women’s college, mannargudi

            A wireless networks of thousands of inexpensive miniature devices capable of computation, communication and sensing their use throughout society “could well dwarf previous milestones in the information revolution” .It Provide a bridge between the real physical and virtual worlds. A new scalable key management scheme forWSNs which provides good secure connectivity coverage. For this purpose, we make use of the unital design theory.  Allow the ability to observe the previously unobservable at a fine resolution over large spatio-temporal scales.  Have a wide range of potential applications to industry, science, transportation, civil infrastructure, and security. Our scheme exhibits a nice threshold property: when the number of compromised nodes is less than the threshold, the probability that any node other than these compromised nodes is affected is close to zero. This desirable property lowers the initial payoff of smaller scale network breaches to an adversary, and makes it necessary for the adversary to attack a significant proportion of the network..Sensor networks are being deployed for a wide variety of applications, including military sensing and tracking, environment monitoring, patient monitoring and tracking, smart environments.Key pre distribution is an important topic that constitutes the basis of security in wireless sensor networks. Many security mechanisms such as encryption and authentication can be provided by accessing to shared keys. Several techniques are Key pre distribution is an important topic that constitutes the basis of security in wireless sensor networks. Many security mechanisms such as encryption and authentication can be provided by accessing to shared keys. Several techniques are previously proposed to address this issue. Previously proposed to address this issue.

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