Integrating Smart Distributed Energy Resources with Distribution Management Systems

2 the output of " utility scale " DERs (> one megawatt). In addition, existing industry standards define advanced functions for DER only at the individual device level, and lack the more aggregated, feeder-level representations that are needed for enterprise integration. This white paper describes ongoing research at the Electric Power Research Institute that is exploring Various ways in which the DMS can utilize these distributed resources more effectively and help in accomplishing the 21st century objectives of electric distribution utilities. A DMS is a decision support system to assist the control room and field operating personnel with the monitoring and control of the electric distribution system in an optimal manner while improving safety and asset protection. Traditionally, electric distribution utilities have relied primarily on manual, paper driven process for electric distribution operations. Managing the electric distribution system was handled in mostly manual fashion with voice communications between responsible parties supported by a collection of independent (standalone) computer systems, communication facilities, and device controllers. DMS is a concept that integrates these mostly independent facilities so that the distribution system can be operated in a well coordinated, highly efficient manner. Figure 1 depicts the DMS " integrated system " concept. Distribution grid modernization (the " smart grid ") is producing Introduction No portion of the electric power grid has been impacted more by grid modernization (the " smart grid ") than the electric distribution system. Grid modernization is transforming distribution operations from mostly manual paper-driven processes to automated computer-assisted decision making and control for distribution system optimization. A central part of this transformation is the Distribution Management System (DMS) which integrates numerous remote monitoring and central control facilities with enterprise level systems to optimize distribution system performance and accomplish a Variety of business goals. At the same time, technology advancements in solar photovoltaics (PV) and battery storage have driven sharp increases in their employment by utilities, consumers, and third parties. These Distributed Energy Resources (DER) are often connected to the grid at the distribution level, and distribution operational requirements are being greatly impacted by their presence. Inverters, the power converter circuits (DC-to-AC conversion), that integrate solar PV and battery resources to the grid are highly-capable devices with advanced message processing and fast power control with nearly instantaneous response to received commands and monitored conditions. Over the last few years, industry efforts have defined a wide range of standard grid-supportive functions 1 …