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Our Energy Story

Overview

Discover how the Singapore Energy Story sets the vision towards a net-zero energy future.

Energy Supply

Gain insights into the four switches that power Singapore’s economy and our daily lives.

Energy Demand

Discover ways to enhance energy efficiency and lower your carbon footprint.

Energy Grid

Explore how EMA ensures a reliable and secure energy supply for everyone.

Energy Market Landscape

Learn about the intricacies of Singapore’s energy market structure and operations.

Consumer Information

Electricity

Get tips on buying electricity and protecting your family from electrical hazards.

Gas

Learn about purchasing gas and safeguarding your family against gas hazards.

Solar

Access information on installing solar panels at your home and selling excess electricity to the national grid.

Regulations & Licences

Regulations

Stay up-to-date with the latest regulations, policies and frameworks governing the energy sector.

Licences

Learn about the licences that EMA issues to different stakeholders in the energy sector.

Regulatory Publications

Read about the Codes of Practice and Circulars that EMA publishes to regulate the energy sector.

Partnerships

Calls for Proposal

Collaborate with EMA in co-creating innovative solutions for the energy sector.

Consultations

Give your comments and feedback on EMA’s policies and regulations.

R&D Engagements

Discover how EMA works with stakeholders to catalyse new and innovative digital technologies.

Talent Development

Learn about EMA’s efforts in nurturing talent and cultivate interest in the energy sector.

Welcome to EMA's website. We would love to have your valuable feedback.

As the Power System Operator, EMA works with market participants to ensure compliance with operational standards and obligations for market administration and operation activities. This ensures that our systems can run smoothly.

Market Administration

Agreements with Market Participants

Market participants in the National Electricity Market of Singapore (NEMS) are required to enter into regulatory agreements with the Power System Operator (PSO). These agreements include:

  • PSO-Market Participant Agreement
  • Generation Facility Operating Agreement
  • Importer Facility Operating Agreement
You may download the relevant agreements under the Forms & Agreements section.

Facility Registration 

Every market participant is required to provide up-to-date data of its facilities to the PSO, including the physical characteristics, ratings and operational limits of all relevant equipment and facilities connected to the system controlled by the PSO.

The PSO uses the information to: 

  • Assess the security and reliability of the power and gas systems
  • Direct operations of the transmission equipment
  • Dispatch the registered generation and load facilities
  • Assist the Energy Market Company (EMC) with registration of the Market Participant’s facility
  • Provide up-to-date data to the EMC for market clearing purpose.

The timely submission of accurate and complete data is critical to participate in the NEMS. This is also necessary for the real-time operation of the power system, outage planning, and stability and security assessment applications.

Market participants may download the latest Facility Registration forms in the Forms & Agreements section. They are also required to register their Generation Facility with EMC.

Market Operations

Market Data Exchange between PSO and EMC

PSO transmits various power system information, including the network status, outage schedules and load forecasts, to EMC.

The NEMS Market Clearing Engine application relies on the most recent network status and measurements data from PSO’s Energy Management System. A network status file is generated once prior to each trading period to provide essential information for the market clearing engine. 

The Outage Schedule files encompass all scheduled network outage for the current and the subsequent seven days. These files are produced daily, providing a comprehensive overview of planned transmission network outage at least daily. In the event of any changes to the scheduled outages for the current or following day, a new Outage Schedule will be generated and transmitted to the NEMS.

The EMS system sends short-term load forecast (STLF) and very short-term load forecast (VSTLF) data to the NEMS.

The VSTLF forecasts load for each trading period up to six hours ahead and is generated once per trading period. On the other hand, the STLF forecasts load for each trading period up to 14 days ahead and is generated daily. 

PSO receives the generation dispatch schedules produced by the EMC and assesses the feasibility of the schedules before dispatching the generators.

The NEMS generates dispatch schedules ahead of each trading period. These are deemed to be dispatch instructions unless overridden by PSO. Dispatch instructions encompass energy, regulation, and reserve schedules for each generation/load facility. 

The Market Clearing application produces short-term pre-dispatch, pre-dispatch and market outlook schedules as defined by the Market Rules. These schedules provide PSO with medium and long-term view of operational feasibility of the dispatch schedules.

Electricity Market Compliance Monitoring

The Power System Operator (PSO) ensures all non-compliance notices issued to market participants are shared with the Market Surveillance and Compliance Panel via the Market Assessment Unit of EMC.

A non-compliance notice can be issued to market participants on either an event of non- compliance with the PSO's directions or dispatch instructions. This could also be due to a breach of market rules, especially regarding the operation of the PSO-controlled system.

Ancillary Services

Ancillary services deal mainly with balancing the power supply and demand over short time intervals throughout the power system. These services, regulation and reserves are essential to ensure the reliable operation of the power system and the acceptable quality of electricity supplies in Singapore.

In addition, the following contracted ancillary services may be procured:

  • Reactive support and voltage control service
  • Black-Start capability
  • Fast-start services
  • Reliable must-run services

Please approach the Energy Market Company (EMC) if you wish to obtain the Ancillary Services Contract.

Outage Co-ordination

PSO is responsible for coordinating the outage schedules of registered generation facilities, generating stations and transmission facilities. This also covers new or retrofitted facilities for construction, testing, commissioning/re-commissioning, and maintenance/repair. 

This is to ensure that there are sufficient generating units and adequate transmission network capacity to meet forecasted demand, operating reserves and the reliable operation of the transmission system.

Power System Adequacy & Security Assessment

The PSO assesses the adequacy and security of the PSO-controlled system on a daily and monthly basis. It prepares the Adequacy and Security Assessment (ASA) over two time-frames: 

  • Monthly assessments, covering a 12-month period commencing from the following month; and
  • Daily assessments covering a 14-day period beginning from the following day.

These adequacy and security assessments are used to identify possible periods of inadequate generation/transmission capacity to cater for expected load. These could also be used when security-related events on the PSO-controlled system require actions to be taken by market participants or PSO. 

These adequacy and security assessments are used to identify possible periods of inadequate generation/transmission capacity to cater for expected load. These could also be used when security-related events on the PSO-controlled system require actions to be taken by market participants or the PSO.