the advanced distribution management system (adms)

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  1. 1. The Advanced DistributionManagement System (ADMS)Managing the distribution network in the Smart Grid eraMarch 2012 / White Paperby Telvent utilities groupMake the most of your energySM
  2. 2. SummaryExecutive Summary . ................................................................................... p 1Introduction ................................................................................................. p 2The ADMS . ................................................................................................. p 4The foundation of the ADMS . ...................................................................... p 5Visualization of ADMS results . ..................................................................... p 6State estimation ensuring the accuracy of ADMS results ......................... p 7Operations planning and analysis ................................................................ p 8Convergence of Technologies . .................................................................... p 9Demand Management ................................................................................. p 10Distributed energy ....................................................................................... p 11Dispatcher training simulator ........................................................................ p 12Conclusion................................................................................................... p 13
  3. 3. The Advanced Distribution Management SystemExecutive summaryThe Advanced Distribution Management System ADMS brings togetherdistribution management system (DMS), supervisory control and data acquisition(SCADA) and outage management system (OMS) technologies , along with controlroom applications, on one, secure platform with a single user interface. With thiscomprehensive mission critical solution, the electric utility can monitor, analyze andcontrol the distribution network to improve the level and quality of service.At its core is the network model representing the as-operated state and basedon the as-built state defined by the geographic information system (GIS). A loadflow algorithm responds quickly to data sourced from throughout the networkto analyze the balanced, unbalanced and dynamically changing network inreal time. Users across the network operators, dispatchers, management,planning engineers and others have consistent visualization of model results ingeographic, schematic and single-line diagram views. State estimation validatesviewed data and estimates non-telemetered points to achieve a complete networkrepresentation.With this accurate network model and a portfolio of robust functionalities, the utilityis empowered with continuous, real-time analysis of the operational state of thenetwork that enables self-healing capabilities. Demand can be managed throughreduction of technical losses; by forecasting near-term load and applying volt/VARcontrol for peak shaving; and by securely integrating and managing distributedenergy resources, including energy storage, to flatten the daily load curve. Theseand other options enabled by ADMS are key to managing demand in the faceof increasing energy usage, surging energy costs and network infrastructureinstability due to aging.The ADMS represents the evolution of control room technology that will helputilities mobilize to meet increasing consumer demand and environmentalobligations and reap many of the benefits all stakeholders expect from their smartgrid investments. White paper | 01
  4. 4. The Advanced Distribution Management SystemIntroductionElectric utilities are preparing for the multitude of challenges facing the industry limited generation to supply increasing energy demand, growing regulatoryand customer pressure for increased reliability and reduced carbon emissions,adoption of distributed renewable generation and energy storage, and theinevitability of both an aging workforce and aging infrastructure.In a rather short period of time, these challenges have converged, and in doing so,have exposed the need for a comprehensive mission critical solution to monitor,analyze, and control the distribution network.This paper will provide an overview of the Advanced Distribution ManagementSystem (ADMS), including its diverse portfolio of functionality and a host ofbenefits for the distribution network owner and the energy consumer.White paper | 02
  5. 5. The Advanced DistributionManagement System
  6. 6. The Advanced Distribution Management SystemThe ADMSFor more than 40 years, utilities have used the The ADMS is the tool that enables the power systemstrength and speed of computers to model electricityengineer and dispatcher to effectively and efficientlynetworks. For the most part, that focus has been on plan, operate, and facilitate work on the distributiontransmission networks, and there are many maturenetwork. It analyzes balanced and unbalanced andsoftware products on the market that provide strong dynamically changing distribution networks in real-functionality for bulk power transmission networks. time, while providing study mode capability for bothbackward and forward review to identify options toModeling distribution networks is a different, and in improve network reliability while lowering electricitymany ways, more complex problem.costs.Instead of the need to model static, meshed, andThe ADMS is the critical tool for management of thebalanced transmission networks, todays ADMSdistribution network, and enables the acquisition oftechnology must model meshed and radial,many of the benefits utilities and consumers expectbalanced and unbalanced distribution networks withfrom their Smart Grid investments.rapidly-changing topologies and demand profiles.Instead of consistent and frequent telemetry fromthe transmission network, ADMS technology mustbe able to coordinate unsynchronized data formanagement of these network models. ADMS mustalso help prepare utilities for islanding portions ofthe distribution network creating the potential forWhat makes a DMS advanced?management of multiple and independent distributionnetworks. When a DMS has advanced functionality such as Volt/VAR Optimization (VVO),The ADMS must also deal with the evolving use of Fault management (FLISR), Near-termelectricity, supporting variable, localized demand load forecasting, and Distributed energyprofiles created by changing consumption habits, and support and includes complete SCADAby new electricity-powered devices such as battery-and OMS technology on the same platformpowered vehicles and high-tech equipment. Further, with the same user interface, then it is an Advanced Distribution Managementthe ADMS must deal with shifting consumption System (ADMS).patterns and customer demand for higher levels ofservice for their devices. Not only must service levelsimprove, but also the service must be of high quality,including voltage levels that operate within regulatorynorms.White paper | 04
  7. 7. The Advanced Distribution Management SystemThe foundation of the ADMSAt the core of the ADMS is the ability to preciselydefine the network model, and to process anunbalanced load flow algorithm based on that modelwith telemetered data taken from the network.he network modelT The ADMS must be able to represent all aspects of the distribution network, including a variety of conductor types, transformers, switches (both manual and motorized), fuses, and other permanent and temporary devices used in distribution system operations. The model represents the as-operated state of the network typically based on the as-built state as maintained by a Geographic Information System (GIS).he dynamic dataT To enable accuracy of the ADMS load flow algorithm, it requires data telemetered from the distribution network. That data is generally made available through supervisory control and data acquisition (SCADA) systems, telemetry, where available, through AMI, and via OMS. The amount of data to be telemetered and stored is significant and changes frequently, suggesting that high performance data management is critical for quick and efficient analysis by the ADMS. This data provides a variety of information (e.g. voltage, current) and device status (e.g. open/closed) to enable the load flow algorithm to provide more reliable results. The unbalanced load flow algorithmThe ADMS must have a very fast load flowalgorithm that can solve unbalanced distributionnetworks based on ever-changing datatelemetered from the field including single phaseoperations such as on laterals, fuses, andunderground network sections.White paper | 05
  8. 8. The Advanced Distribution Management SystemVisualization of ADMS resultsWith a complex network model, significant quantitiesof data (both telemetered and calculated) and thewide variety of ADMS users (operators, dispatchers,management, planning engineers, etc.), providingvisualization of ADMS results is an importantconsideration. An ADMS should be able to displaynetwork data in a geographic view, a schematicview, and in single-line diagrams. Further, the end-user should be able to easily manage the level ofinformation displayed in these views.Individual utilities have developed different meansto view their network information over time, and theADMS must be flexible enough to support the formatdesired by the utility.White paper | 06
  9. 9. The Advanced Distribution Management SystemState estimation ensuring theaccuracy of ADMS resultsGenerically, state estimate can be defined as abranch of probability and statistics concerned withderiving information about properties of randomvariables, stochastic processes, and systems basedon observed samples. In power networks, stateestimation validates observable data and estimates allnon-telemetered points in order to derive a competenetwork representation.The quality of data collected from various pointson the distribution network

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