A new energy management system for distributed resources (DEMS) and a new distribution network management system have been introduced by Siemens.

Virtual power plants are one of the most important application fields for the new DEMS 3.0 energy management system. DEMS 3.0 consists of two subsystems, the DEMS Designer, a graphic tool for data engineering, and a runtime system with a new user interface. The system can be used on the market for minute reserves and is prepared for use in the secondary regulated energy market.

DEMS Designer works with a graphic data entry system that enables users to remain in their modeling world when they are developing the topology of their energy system. From a software catalog, users select elements with predefined data models with which they want to model their energy system, e.g. generation, load or storage systems. The elements are then positioned and connected to match the energy and material flows. Menus for the parameters of the specific resources are assigned to each element. Subsequently, the design and the parameterization of the distributed plants to be controlled are transferred to the runtime system.

The system communicates with the connected generation, load or storage systems in accordance with IEC 60870-5-104. DEMS Designer additionally stores the parameters for the communication connection and the plant connection in combination with the DER controller (Distributed Energy Resources).

DEMS 3.0 can also be used for aggregators, and makes it possible for operators of microgrids to operate their networks more efficiently.

The new distribution network management system has been specifically developed for building and expanding smart grids. Spectrum Power ADMS (Advanced Distribution Management System) combines SCADA, outage management, and fault and network analysis functions on a software platform under a common user interface.

By suggesting actions to be taken and through automated processes, the system assists operators at the grid control centers in repairing and reconnecting the affected network section as quickly as possible after a fault. Another strength is the intelligent use of smart meter data for fault detection and clearance and for controlling and monitoring distributed energy sources.

Since it was developed for integration in a service-oriented architecture (SOA), the system can make use of services and data of other IT systems, such as cards and network data from geoinformation systems or load profiles from meter data management systems. In the same way, other IT systems can access services and data in the distribution network management system.

The system provides the grid operator with the right tools to comply with the requirements of current international reliability standards such as NERC CIP or those of the U.S. NIST (National Institute of Standards and Technology). Interoperability standards such as IEC 61970 (common information model) and IEC 61968 (system interfaces for distribution networks) have also been taken into account in the development of Spectrum Power ADMS.

“If new energy policies are to succeed, we need to make our distribution networks more intelligent. They must also be capable of being controlled efficiently as smart grids in order to effectively channel the increasing volume of electricity fed in from renewable energy resources. This is exactly what our new system allows power supply companies and utilities to do,” explained Jan Mrosik, CEO of Siemens Smart Grid Division.