Energy management system

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An energy management system (EMS) is a system of computer-aided tools used by operators of electric utility grids to monitor, control, and optimize the performance of the generation or transmission system. Also, it can be used in small scale systems like microgrids.^[1][2]

Terminology

The computer technology is also referred to as SCADA/EMS or EMS/SCADA. In these respects, the terminology EMS then excludes the monitoring and control functions, but more specifically refers to the collective suite of power network applications and to the generation control and scheduling applications.

Manufacturers of EMS also commonly supply a corresponding dispatcher training simulator (DTS). This related technology makes use of components of SCADA and EMS as a training tool for control center operators.

Operating systems

Up to the early 1990s it was common to find EMS systems being delivered based on proprietary

. The VAX 11/780 from Digital Equipment was a popular choice amongst some EMS suppliers. EMS systems now rely on a model based approach. Traditional planning models and EMS models were always independently maintained and seldom in synchronism with each other. Using EMS software allows planners and operators to share a common model reducing the mismatch between the two and cutting model maintenance by half. Having a common user interface also allows for easier transition of information from planning to operations.

As proprietary systems became uneconomical, EMS suppliers began to deliver solutions based on industry standard hardware platforms such as those from

server.

See also

• Energy accounting
• Energy conservation measure
• Energy management
• Energy management software, software to monitor and optimize energy consumption in buildings or communities
• Energy storage as a service (ESaaS)
• Load management for balancing the supply of electricity on a distribution network.

References

Further reading

• EPRI (2005) Advanced Control Room Energy Management System: Requirements and Implementation Guidance. Palo Alto, CA. EPRI report 1010076.
• EEMUA 191 Alarm Systems – A Guide to Design, Management and Procurement (1999)
  ISBN 0-85931-076-0
• ASM Consortium (2009) – Effective Alarm Management Practices
  ISBN 978-1-4421-8425-1
• ANSI/ISA–18.2–2009 – Management of Energy Systems for the Process Industries
• IEC 62682 Management of Energy systems for the process industries