We rely on state-of-the-art systems to monitor and control the supply and transmission of electricity such as the Electricity Management System, Gas Monitoring System, Interruptible Load Monitoring System to name a few. Read more about these and the other systems we use.

Electricity Management System

The Electricity Management System (EMS) is a state of the art real-time system that enables the system operators to remotely monitor and control the generation plants and transmission network of Singapore.

It is a mission-critical real-time computer system that allows various functions to be carried out.  The EMS provides the system operators with real-time information on the generating plants, transmission stations equipment and transmission lines which are monitored by equipment (remote terminal units) installed at those sites. Any abnormal condition or malfunction of equipment in the power system is immediately detected and transmitted back to the Control Centre for analysis and action. The system operators also monitor the total on-line generation capacity closely to ensure that generation must always meet demand for electricity that varies continuously and with adequate reserve to cater for unexpected loss of any online generator.

A major function of the EMS is the Automatic Generation Control (AGC), it monitors the demand for electricity and automatically adjust the output of generators every few seconds to match this every changing demand. It also allows system operators to manually adjust the output of various generators in the system to meet unexpected changes.

The EMS forecasts  the next 14-days’ electricity demand for Singapore. This function runs daily and provides a forecast of the half-hourly average system demand for the next 14 days. In addition, it runs on a half-hourly basis and adjust the forecast for the next 7 hours.

Apart from the above functions, the EMS system is equipped with Decision Support Tools for our system operators. These include, power flow analysis, on-line short-circuit studies, contingency analysis and security checked switching. A Dispatcher Training Simulator is used for creation and simulation of scenarios to train our system operators on handling of power system emergencies.

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Gas Monitoring System

The Gas Monitoring System (GMS) is a state-of-the-art redundant real-time computer system. It interfaces with the SCADA (Supervisory Control and Data Acquisition) systems of the Gas System Operator and the Onshore Receiving Facilities to receive real-time information on the Natural Gas Transmission System. The real-time information on valve status, gas pressure and other status and measurement, enable our operators to oversee operation of the Natural Gas Transmission System and to safeguard the reliability and security of the electricity system. The system also has integrated advanced Gas Application software for real-time analysis of the gas system dynamics to assist the operator in pre-empting and responding to natural system emergency situations with potential impact on the electricity system.

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Interruptible Load Monitoring System

The Interruptible Load (IL) Monitoring System is an Internet-based system use to monitor near real-time availability and performance of IL facilities participating in the NEMS. It is also used for compliance monitoring such as ability to curtail load within the stipulated time-frame

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Distributed Generator (DG) Monitoring System

The Distributed Generation (DG) Monitoring system is an Internet-based system used to monitor near real-time availability, connection status and performance of DG facilities (voltage and frequency), output (real and reactive power). Where the DG is also a Generation Registered Facility participating in the NEMS, it is also monitored for compliance with dispatch instructions.

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Operation Support System

A Windows-based archival and information support system, the Operation Support System provides facilities to manage and analyze half-hourly data and dispatch schedules related to operation of the NEMS.

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Planning & Analysis System

The Planning & Analysis System comprises of several power and gas engineering software essential for adequacy, security, dynamic, transient stability, reliability studies of the power and natural gas systems.

PSS®E (Power System Simulator for Engineering): It is use for assessment of the long-term electricity transmission system development plan. The software enables our planning engineers to perform load flow, short-circuit studies and contingency analysis as well as analyses stability of the electricity transmission system for various simulated major power system disturbances scenarios.

Matlab/Simulink: This software enables our planning engineers to construct detailed model of generating plants and simulate their behaviors individually. The software uses advanced numerical, detailed models of components that are presented in a graphic block diagram configuration. These are then converted to PSS@E format for power system dynamic studies and post-mortem analysis.

PPlus: It is a generation planning software for studies of long-term generation capacity adequacy in meeting system demand growth typically over multi-years horizon. It uses probabilistic and Monte-Carlo simulation technique estimate Loss of Load Probability (LOLP) and Energy Un-served (EUE) for various generation planting scenarios.

PipelineStudio (natural gas): A hydraulic simulation software, it is used for adequacy and dynamic stability assessment of the natural gas transmission system. The software allows modeling from single pipeline transmission to complex multiple injections of gas sources, delivery points, compressors and other parameters that affect the operation of the natural gas transmission system.

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