47 Implementation <strong>of</strong> SCADAIEMS System for Distribution System Automation P. V.Chopade, D. G.Bharadwaj, Bharati Vidyappeth University <strong>College</strong> <strong>of</strong> <strong>Engineering</strong>, <strong>Pune</strong>, INDIA 48 NDPL Substation Automation Project: Step forward for Automation integration Sanjay kumar Banga and Ajay Prashant Biswas, NDPL, New Delhi 49 Omniagate )
Paper for National Conference on Distribution Automation @CPRI Bangalore Implementation <strong>of</strong> SCADA/EMS System for Distribution System Automation P.V.Chopade Member IEEE, Abstract- Automation <strong>of</strong> power distribution systems has increasingly been adopted by power utilities worldwide in recent years. This is to provide a more reliable supply to its customers and to enhance operational efficiency. This can be used for the distribution network <strong>of</strong> about llKV to 25 KV. SCADA system can be used as an important building block for automation <strong>of</strong> distribution network. The SCADA system was commissioned and became operational in mid 1988. Due to continuous network expansion & increasingly higher expectations <strong>of</strong> consumer demands for electrical energy are continuously increasing. So the distribution system needs continuous upgrading to incorporate more remote terminal units (RTUs) as well improved functional enhancements. In this paper implementation <strong>of</strong> SCADA system in distribution automation & the benefits through incorporating such system are presented; along with a case study for PECO energy company. Index Terms (Keywords) - seA DA/EMS, Distribution System, Automation. I. INTRODUCTION Electric power is normally generated at <strong>11</strong>-25kV in a power station. To transmit over long distances, it is then stepped-up to 400kV. 220kV or 132kV as necessary. Power is carried through a transmission network <strong>of</strong> high voltage lines. Usually, these lines run into hundreds <strong>of</strong> kilometers and deliver the power into a common power pool called the grid. The grid is connected to load centers (cities) through a subtransmission network <strong>of</strong> normally 33kV (or sometimes 66kV) lines. These lines terminate into a 33kV (or 66kV) substation, where the voltage is stepped-down to IlkV for power distribution to load points through a distribution network <strong>of</strong> lines at IlkV and lower. P.V.Chopade is with the Bharati Vidyappeth University <strong>College</strong> <strong>of</strong> <strong>Engineering</strong> ,<strong>Pune</strong>-43, M.S.,INDIA, Member IEEE. ( phone: +91- 020-24370991: fax +91 020- 24372998' e-mail: plavinchoml.!~ccl.:.org). ~ D.G.Bharadwaj is Pr<strong>of</strong>essor <strong>of</strong> Electrical <strong>Engineering</strong> Department and Head <strong>of</strong> Research and Development Cell, Bharati Vidyappeth University <strong>College</strong> <strong>of</strong> <strong>Engineering</strong> ,<strong>Pune</strong>-43, M.S.,INDIA. (e-rnail: dattatra\.Mveth.net). D.G.Bharadwaj Distribution Automation System (DAS) as a system that enables an electric utility to remotely monitor, coordinate and operate distribution components, in a real-time mode from remote locations. The distribution automation system is based on an integrated technology, which involves collecting data and analyzing information to make control decisions, implementing the appropriate control decisions in the field, and also verifying that the desired result is achieved. The location, from where control DA system is beneficial in day-to-day operation and maintenance <strong>of</strong> distribution network. The other benefits <strong>of</strong> the distribution automation are: reduced technical and commercial losses, improved cash flow, lower electric service restoration time, reduction in equipment damage, better availability <strong>of</strong> system information, improved operational planning, remote load control and shedding, and enhanced power quality and reliability I!. NEED OF DISTRIBUTION SYSTEM AUTOMATION [I ][2] To minimize Distribution Losses: The demand for electrical energy is ever increasing. Today over 21% (theft apart!!) <strong>of</strong> the total electrical energy generated in <strong>India</strong> is lost in transmission (4-6%) and distribution (15-18%). The electrical power deficit in the country is currently about 18%. Clearly, reduction in distribution losses can reduce this deficit significantly. It is possible to bring down the distribution losses to a 6-8 % level in <strong>India</strong> with the help <strong>of</strong> newer technological options (including new technology) in the electrical power distribution sector which will enable better monitoring and control. To minimize voltage sags & interrupts: In general, medium voltage (MV) power distribution networks are operated radially, with different levels distribution automation. Investment in distribution automation is a technical and an economic optimizations issue to considered in distribution network design. The purpose is minimize long term total costs including costs <strong>of</strong> investments, losses, outages and poor power quality within relevant constraints. Power quality is <strong>of</strong> increased concern. Previously, long interruptions have been <strong>of</strong> major interest but nowadays focus is on shorter interruptions. From the customer point view, short interruptions and voltage sags affect customer equipment in the same way. Distribution automation caused to control the influence <strong>of</strong> interruptions and voltage sags.
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