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Smart Distribution
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Smart Distribution

Smart Distribution

The development of Smart Grid System.

      The advancement of technology in the energy sector has caused significant changes to the power grid, such as more distributed generation, increasing role of renewable energy by switching from fossil fuel to renewable sources particularly in the transportation sector. Therefore, MEA has developed the Smart Grid system to balance the system for all sectors, both energy consumers and producers, to have their own management and information linked systems to provide precise power control, and electricity management for both generation sector and consumption sector so that customers will be able to manage their electricity usage to suit their lifestyles and usage habits. Energy storage system was also provided to reduce energy instability issues of some renewable energy power generation systems and to maintain and improve power quality


      The development of Smart Grid system by MEA is in line with the Thailand Smart Grid Development Policy and Plan of B.E.2558-2579 (2015-2036), supporting strategies and the values of MEA or "CHANGE" with the focus in the benefit to customer. MEA has engaged the cross department collaboration and rapidly adjusting work patterns in accordance with technology in order to create new idea or innovations for use in MEA which every working processes are carried out with transparency and efficiency. The progress of development of Smart Grid system invesment activities in 2021 are as follows:


Monitoring & Control

Supervisory Control and Data Acquisition/Energy Management System / Distribution Management System (SCADA/EMS/ DMS)

      MEA signed the contract of SCADA/EMS/DMS System Replacement Project, which has the modern technology for increasing the control capability of feeder in 12 kV and 24 kV. In 2021, MEA is installing SCADA/EMS/DMS system that communicates with device in substation and distribution through Remote Terminal Unit (RTU) to monitoring and controlling. In addition, SCADA/EMS/DMS System is able to manage energy in electrical system, estimate future energy consumption and makes more efficient control of the system and fixing power outages. There are functions for this system as the following:

1. Real-Time Network Analysis

      The Network Analysis functions execute in a sequence referred to as the Real-Time Sequence (RTS). The RTS results allow the user to visualize the current state of the power system, the potential effect of contingencies, and thereby determine if corrective or preventive control action is necessary.

The real-time Network Analysis functions are named as follows, where they are listed in the order in which they normally execute as a part of the RTS: Real-Time Model Update (MU), State Estimator (SE), Bus Load Forecast (BLF), Network Parameter Adaptation (NPA) and Security Analysis (SA)

2. System Load Forecast (SLF)

      The System Load Forecast (SLF) function is based on a short-term load forecast model to forecast the total power system load for a variable period from the time of the forecast request. These loads correspond to the HV and MV loads served by the power system network with in all service areas. The load values from SLF are capable of being used to support the Network Analysis functions such as Bus Load Forecast.

3. State Estimator (SE)

      The State Estimator (SE) function provides consistent, updated, reliable, and most probable power flow solutions of the HV/MV power system using the current network model of the power system along with real-time status and analog measurements, forecasted and scheduled values, and user entries, which for the MV network is based on an unbalanced three-phase model. Solutions for all observable and unobservable portions of the power system are provided. 

4. Network Parameter Adaptation (NPA)

      The Network Parameter Adaptation (NPA) function provides and maintain parameters that are not directly monitored.

      The forecasting parameters are adapted from the following information sources:

1. State Estimator solutions
2. Circuit breaker status time and/or load dependencies

3. Statistics of monitored real-time parameters

4. Bus Load Forecast solutions 

5. System Load Forecast solutions

6. User adjusted parameters via an interface that allows the on-line tuning of power system results by making changes to network characteristics such as those associated with lines and transformers

5. Security Analysis

      Security Analysis (SA) function is used to assess the security of the HV power system under specified contingency conditions. Security Analysis provides the capability to evaluate a contingency involving increase or loss of generation or increase or loss of load by generation reallocation in the external network.

6. Fault Location, Isolation, and System Restoration

      The objective of the Fault Location, Isolation, and System Restoration (FLISR) application is to improve customer service by minimizing the duration and extent of forced outages due to real-time faults directly affecting the MV power system network.

Whenever sustained faults are detected by FLISR, the Dispatchers are notified by a special FLISR “alarm” indication and, upon acknowledgement, taken directly to that part of a schematic or geographical world-map display where the fault has occurred and where the results of any FLISR actions as well as the fault information reported by FRTUs (such as fault current direction) can be viewed. Furthermore, the Dispatchers are able to quickly navigate from this display to the display where the FLISR recommendations can be viewed.

Load Break Switch/Feeder Remote Terminal Unit (LBS/FRTU)

      LBS/FRTU installation and DMS implementation in industrial estates Project. Since industrial estates have a large number of industrial plants, the industrial sector is one of the key mechanisms that will lead Thailand in the national development and enhancement of the countrys strong and sustainable competitiveness. MEA, therefore, initiated this project to increase the stability and reliability of the electricity system with the aim of reducing the downtime of electricity supply continuity. In 2021, the installation of LBS / FRTU was expanded to MEA district offices in 18 areas, including important industrial estates, in which LBS/FRTU was tested in connection with the DMS system to monitor and remotely control LBS/FRTU. The installation of LBS/FRTU equipment in Ladkrabang, Bang Plee, Asia and Bang Chan Industrial Estates have been completed.

MEA-GIS Features

      For more than 20 years, The Metropolitan Electricity Authority has developed Electrical geospatial database under the name of GIS (Geographic Information System) include high resolution land base map and electrical system map in area of responsibility: Bangkok, Nonthaburi and Samut Prakan

Constituents of MEA-GIS

1. HV Network: Route details of 69, 115, 230 KV network from EGAT to MEA terminal station and terminal station to substation.

2. MV Network: Route details of Feeder 12, 24 KV and electrical distribution equipment from Substation to Distribution transformer.

3. LV Network: Route details of Low Voltage cable 230/400 V to customer location through smart meter and Watt-hour meter.

4. Communication network: Route details of Optical Fiber Network.

Main Layer Group in MEA-GIS

1. Land Base: Contain details of landmark points, landmark line, center line, district poly, center line, road edge, building, building line, hydrology, etc.

2. Public Electrical System: Contain details of CCTV, street light, street light control, Pole, overhead & underground streetlight voltage conductor, etc.

3. Overhead Electrical System: Contain details of overhead high/medium/low voltage conductor, pole, circuit breaker, fuse, transformer, group meter, high tension meter, etc.

4. Underground Electrical System: Contain details of underground high/medium/low voltage conductor, underground streetlight conductor, manhole, duct bank, etc.

5. Optical Fiber System: Contain details of fiber optic cable, fiber rack, fiber room, fiber slack loop, fiber building, etc.



FFM Features

      FFM (Field Force Management) is a system that help to improve efficiency of MEA’s fieldwork staff to fix electrical problems quickly from customer complaint with MEA Smart Life Application and Call Center. The FFM system are connected to SAP and GIS for the following benefits. 

1. Schedule & Dispatch work orders/calls based on the proximity of crews with event site

2. Take demand Reference based on integration of FFM & GIS (Such as Hospital, Industrial Estate)

3. Record customer satisfaction feedback, work order, asset requisition

4. Generate the reports from historical outages, outage call, customer satisfaction feedback

5. Check overdue balance from Meter number

      In the future, we will develop FFM system to support smart grid technology be connecting with this following system

1. Outage Management System: To receive analysis and notification of power outages from smart meter, TLM meter and SCADA/EMS/DMS.

2. MEA Smart Life application and MEA Line connect:
To report power outage status to customer



Communication Network

      MEA has private optical fiber network and data center. The optical fiber network of MEA covers the whole responsible area which are Bangkok, Nonthaburi and Samut Prakan over 32,000 km.

      MEA has been granted a license to operate Type 3 of Telecom Licenses from the Office of The National Broadcasting and Telecommunications Commission (the “NBTC”) and has offered a service to other state enterprise sectors in rental or connecting the unused MEA network with stability, quality, and service as our priorities.

      MEA has multi-network technology consisting of IP technology, Dense Wavelength Division Multiplexing (DWDM) technology, and Synchronous Digital Hierarchy (SDH) technology to separate each of services like front office, back office, power system, security, help desk support, high priority network, and bring your own device (BYOD) network. In the future, MEA will change to software-defined networking (SDN) from multi-network technology. The SDN benefits are centralized management of the entire network, scalability, optimizing hardware devices.


      MEA has Security Operations Center (SOC) and Network Operation Center (NOC) facility that can offer performance monitoring features to manage security and network over 24/7 for prevention and detection of internet and email threats.