City of Anaheim City of Pasadena   Taichung -- Taiwan Power Company The Mailbox RTU   Municipal Electric Authority of Georgia
Taiwan Power (Tai-Chung District) customer description see project schematic here (requires Adobe SVG viewer) Mission: Provide electrical energy service to Residential, Commercial, and Industrial customers throughout the Tai-Chung Power District. Business Issue: The city of Tai-Chung is heavily industrialized and densely populated. Getting field personnel to faulted areas can take hours. Taiwan Power requires a DA/DSM system that can remotely isolate and restore feeder faults on multiple circuits simultaneously. The system is to automate the process to the point that operators can manage the restoration of multiple circuits simultaneously. Key system elements Fully distributed system architecture with SCADA, Application, and Historical data servers GIS based source database for operator maps and facility data and network topology Fault Detection, Isolation, and Service Restoration - Feeder faults - Substation faults - Return to pre-fault configuration - Storm mode Capacitor Bank Control Automatic Meter Reading - Demand and energy meter reading data - Meter tampering data - Meter malfunction data> Data concentrators Load Management Real-Time Pricing Direct Load Control Voluntary Load Reduction Transformer Load Survey Outage Scheduler Trouble Call System Distribution System Analysis Optimal Switching Short Circuit Analysis Protection Coordination Optimal Capacitor Placement Distribution Dispatcher Training Simulator AM/FM Integration Project description The Tai-Chung power distribution network encompasses 180 square kilometers, serves more than one million people, and incorporates 3 distribution substations, 13 secondary substations, 38 main transformer banks and associated feeders, switches, capacitors and distribution transformers. While it is common in the U.S. for customers or outside consultants to coordinate the design, purchase and installation of control systems, Asia and South America systems are typically sold on a turnkey basis. This is the case with the Tai-Chung project, where the joint venture will provide a fully integrated, operational system, rather than individual components to be incorporated by the customer or a third party. ACS is under contract with Taiwan Power Company to design, build and deploy a fully-implemented Distribution Automation and Demand-Side Management (DA/DSM) system. The project will automate power distribution for Tai-Chung, Taiwan's third largest city. Installation began in April 1999, with completion scheduled for 2000. The primary purpose of the system is feeder automation, including overhead, underground and mixed feeders. It incorporates advancements such as real-time trouble-call analysis and feeder fault detection/restoration, including a virtually instantaneous display of trouble spots. All operations will be fed by a single database image of the complete distribution system. This real-time capability includes true graphical map displays and requires complete integration of the databases for trouble-call, fault detection and distribution. The connectivity model supporting these features, as well as fault isolation and load management, is technology pioneered by Advanced Control Systems. This is the most significant component of the system, which will monitor and regulate electrical distribution all the way to the end user. The system is designed to increase up-time and reduce operating costs for Taiwan Power. Tai-Chung is heavily industrialized and densely populated -- simply getting to the area affected by a power failure can take hours. Without up-to-date facilities for finding and isolating faults, homes and businesses are at the mercy of a lengthy trial-and-error procedure. When the project is completed, Taiwan Power will be able to locate, isolate, and, in many cases, resolve power outages automatically, without dispatcher intervention, in real time. Supporting control features include automatic meter reading; distribution network mapping down to individual households; and load management/surveillance, which will allow the power company to monitor and adjust power consumption remotely. The project will also incorporate distribution system analysis (distribution power flow, optimal switching, short circuit analysis and protection coordination). A development system is also part of the project. This gives Taiwan Power the ability to construct prototype databases, develop their own control strategies and perform distribution modeling tasks. The latter is valuable for determining appropriate expansion of the distribution system. Project hardware to be supplied by Advanced Control Systems includes a master station and workstations connected on a local area network, along with data links and communication subsystems. Automatic switches will replace manual switches, and remote terminal units (RTUs), feeder terminal units (FTUs), data concentrator units (DCUs) and customer terminal units (CTUs) will be installed. System sizing CTUs 42 data concentrator units with power line carrier communications to automatic meter reading CTUs and Transformer Load Survey CTUs 6 data concentrator units with power line carrier communications to Load Management CTUs 1232 sensor for customer meters modification 130 customer terminal units for high voltage customer for Direct Load Control/LM 10 customer terminal units for high voltage customer of Real Time Pricing 20 customer terminal units for high voltage customer for Interruptible / Voluntary Load Reduction 1208 customer terminal units for low voltage customers 873 customer terminal units high voltage customers FTUs 159 FTUs for pole-mounted line switches 305 FTUs for pad-mounted line switches 16 FTUs for automatic transfer Switches 159 2-way pole mounted line switches 82 4-way pad mounted line switches for 15kV 223 4-way pad mounted line switches for 27kV
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