Automated Monitoring and Control

Moving to a smart grid requires advancements to the way we monitor & control energy.

Moving to a smart grid requires advancements to the way we monitor & control energy. Included among them are:

Utilization of SCADA

Supervisory Control and Data Acquisition (SCADA) is a system that allows distributed input to be continuously monitored and controlled remotely.

There are 4 modules in the Master System for Distribution Network:

  1. State Estimator
  2. Power Flow
  3. Feeder Optimisation
  4. FLISR and Switching Sequence Capabilities

Using Distributed Automation (DA) integrated SCADA technology with field equipment technology (such as earth fault indicators and SCADA-rised circuit breakers) allows remote restoration of supply in the event of power outages.

We have been making good progress in adopting smart grid technologies including distribution automation (DA). In 2020, we installed 1,961 substations with DA systems bringing the total number of enabled substations to 17,965. This means some 1.9 million customers can now enjoy recovery of electricity in as fast as 5 minutes in the event of outages or breakdowns.

DMS to ADMS conversion

Advanced Distribution Management System (ADMS) is a software platform integrating numerous utility systems, which provide automated outage restoration and optimization of distribution grid performance. This will translate to higher reliability, reduced technical losses, enhanced work safety, shortening service restoration time during outages and increasing grid resiliency to natural disasters and other threats that could disrupt the flow of power to the end user.

Modules in our ADMS implementation:


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Data Analytics

A smart grid affords more accurate information on user energy consumption and generation, in real time through a more data-driven.

Smart Meter Coverage

We also pushed ahead with the installation of smart meters, bringing the total number deployed to date to nearly 1 million smart meters mainly in Melaka and the Klang Valley. Under our phased plan, we are to deploy a total of 1.5 million smart meters by 2021 and another 2.1 million by 2024, covering approximately 40% of our customers in Peninsular Malaysia. Smart meters provides customers detailed information of their energy consumption with 30 minutes interval and bills leading to enhanced customer experience allowing customers to better control their consumption and be more energy efficient.

This initiative is in line with TNB’s commitment towards Goal 8 of UN Sustainable Development Goals (SDG) and Shared Prosperity Vision (SPV) 2030’s Strategic Thrusts 2 (Key Economic Growth Activity) to build resilient key economic sectors in the areas of green economy and renewable energy. Smart Meters can drive productivity & digital innovation, and serve to improve efficiency and provide new customer experiences through digitalization.

Compared to the conventional electricity meter, smart meters are equipped with additional digital and telecommunication facilities for two-way communication. This enables the smart meter to record customers’ electricity usage and automatically communicates the information daily through various channels, primarily using Radio Frequency (RF) and to a lesser extent Power Line Carrier (PLC) and Cellular Network technologies.

With the information being available via the myTNB mobile application and myTNB Portal), it allows customers to manage their energy consumption more efficiently which will translate to reduced bills and carbon footprint.

Asset Management with Analytics Applications

Given the importance of energy to national security, our assets have been classified as Critical National Information Infrastructure (CNII). We recognise our responsibility to ensure this infrastructure is maintained and protected, hence we have adopted a holistic asset management approach to fulfil this need.

Our Asset Management Plan is an effective asset management system with ISO 55001:2014 Asset Management certification, to optimise cost, risk and performance across the asset lifecycle. Under the plan, we have outlined the implementations necessary to realise TNB’s asset management policy, strategy, and objectives.

Asset Performance Management System (APMS)

We have also implemented Asset Performance Management System (APMS) using the I.P.S asset analytics platform, to facilitate analysis operations, maintenance, risks and opportunities, as well as performance and sustainability of power assets

The project was piloted in Kuala Lumpur and Selangor in 2019 and targeted to be rollout to nationwide upon successful pilot implementation and system stabilization. In APMS, TNB have the capability using world-leading highly advanced software and analytics for Asset Performance Management Solution to accurately assess Asset Health and predict Asset End of Life, calculate What-If analysis and Capex & Opex optimization. Asset Health Index (AHI), Asset Criticality and Asset Risk Index is automatically generated by the system based on data fed from visual inspection and condition test results conducted on the primary equipment by operation and maintenance field crew. AHI, Asset Criticality, and Asset Risk Index will determine the actions required for the equipment in terms of planning of the next test schedule and replacement of defective equipment.  APMS can be used as data analyzing tool, trending and life extension of equipment in asset maintenance regime. The end goal is to have a seamlessly integrated system for asset performance management that enables TNB to optimize Asset Risk, Performance and Total Cost of Ownership (TCO).

As of 2020, the modules have been fully rolled out to maintenance engineers in KL and Selangor, and plans for nationwide rollout is well underway.

i-NET (Integration Network Expansion Tool)

i-NET is a custom-built analytical solution created for TNB’s Asset Planning & Performance Unit to facilitate centralized planning & capacity allocation.

Along with process automation, this solution acts as a decision support system for asset managers to conduct system studies, load disaggregation, and load forecast and capacity planning using an analytics platform engine.

In addition, we undertake several analytics driven projects to facilitate asset management:

Project Description
Intelligent Predictive and Diagnostic Monitoring (IPDM) System Utilises a software that enables plant operators to detect anomalies in the operations of major assets, thus allowing for early preventative actions.
Drones Aerodyne drone services to perform Condition Based Maintenance (CBM) of bare overhead lines nationwide. There are plans underway to incorporate AI- assisted technology for better, and faster health index reporting.
Online Monitoring System for Gas Analysis Assesses the condition of transformer bushings and gas-insulated switchgears
Automatic Fault Analysis and Fault Location Identification System Assists operation and maintenance team for faster decision-making during restoration processes.
Geographic Information System Provides accurate location information to manage, operate and analyse TNB’s network assets.


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Supply Reliability

No matter how smart a grid is, it also has to remain reliable to ensure uninterrupted supply and generation to the people.

Supply reliability dimension is measured on SAIDI metrics of the utility. Malaysia’s SAIDI index remains one of the most reliable in ASEAN countries at 44.95 mins with the most competitive tariff. Our SAIFI had also improved to 0.80 in 2020.



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Distributed Energy Resources (DER) Integration

The grid of the future will also enable users themselves to distribute energy back to the grid, providing new sustainable energy sources to those that need it.

Management of Distributed Energy Resources (DER)

In line with TNB’s energy management aspirations and the potential flexibilities of a grid of the future model, the distribution of energy resources, especially from solar, biomass, biogas sources needed to be easily connected to the customer at any point.

We needed to ensure all the energy that will be injected into the system can be easily distributed across the grid. As such, our DER integrations serve to facilitate and encourage this connection, via the facilitation of consultations regarding tariff options, connection methods, payback schemes and other required information, effectively providing the role of an electrical contractor consultant to our consumers. As such, we have developed a DER connection guideline which is made available for service providers, electrical contractors and consultants.

To better facilitate such connections, we needed to automate all the necessary information for customers, such as how or where to connect to the network, and the distributed generation hosting capacity.

As such, we plan to automate hosting capacity information, which will be made available to enable users to check for vacancies within the grid for connections at our main power distribution centres (pencawang pembahagian utama). As of 2020, we provide a static list of medium voltage capacity visibility information so our consumers can find out where they can tap in for their power requirements. We will be utilizing a Geographic Information System (GIS) platform to provide visual visibility, akin to a virtual map to locate the nearest electrical contractor or service provider.

In September 2019, the Government announced it was embarking on industry reforms via MESI 2.0 with the aim of delivering reforms across the value chain. The potential reforms include to enable TPA to the grid system for electricity transmission and distribution while ensuring that the Grid is able to facilitate distributed energy resources under the Grid of the Future (GotF). Looking forward, TNB intends to go beyond traditional investments in grid expansion to develop the Grid of the Future. This includes digitalising the grid to improve operational efficiency, as well as deploying technologies that enable distributed energy resources.

Distributed Generation (DG) Hosting Capacity

TNB in collaboration with SEDA has developed a static list of DG hosting capacity for developers who wish to connect to Renewable Energy (RE). The list of Nodal Points can be used as a preliminary guide for any new RE projects to be connected to TNB’s distribution network at medium voltage levels (33kV and 11kV). These nodal points can be used as a reference for new RE projects in the TNB distribution network under the Feed-in Tariff (FiT) system as well as projects under the Net Energy Metering (NEM) scheme. The list of nodal points was established based on the following criteria:

a. Distribution substations with short circuit fault levels of not more than 90% of the switchgear rating, to meet the requirement stated in clause of the Distribution Code; and
b. If there is sufficient load at the substation:

To find out the location for the nearest TNB nodal points, click here.

As of 2020, TNB has opened a discussion on hosting capacity function requirements for distribution within the network. The objective is to provide Medium Voltage (MV) network hosting capacity visibility to Distribution Network (DN) planners for Distributed Generation connection planning by using the GIS platform. It also prepares DN planners to be the enabler of energy integrations more efficiently when the platform is stabilized for external party access for DG planning later on. This in turn will support Renewable Energy Penetration in line with the government’s aspiration. Hosting capacity using the GIS platform is required for the visibility of the allowable amount of renewable energy resources that can be connected to the MV network according to technical criteria set in our DG connection guidelines. The data sharing for all external parties is governed by the ‘Akta Kawasan Larangan dan Tempat Larangan 1959 (Akta 298)’ act. Currently, 59 PMU stations & power plants have been identified, subject to CGSO approval.

The hosting capacity map project has already been initiated for data collection and analysis since 2019. The technical requirements of the project are already in progress for development. The project kicked-off in September 2020, with the pilot and prototype delivered to Kuala Lumpur/Putrajaya by the end of the year. The nationwide roll-up is on course to be completely deployed this year.


myTNB provides all the information required for customers who wish to pursue Renewable Energy, such as:

  1. Listing the benefits of generating your own RE
  2. Finding the right RE connection scheme for customers
  3. Supplementing information about all green related products in TNB
  4. Detailed information and guidance for all the available RE schemes in Malaysia such as:
    • Solar Energy Purchase
    • Net Energy Metering (NEM)
    • Self Consumption Scheme (SELCO)
    • Feed in Tariff (FIT)
    • Large Scale Solar (LSS)
    • New Enhance Despatch Agreement (NEDA)

Additionally, myTNB links all potential customers to access the relevant guidelines and documents needed to proceed with the process:

Find out more here.

To explore the steps to connect to RE for consultants, head here.


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Green Energy

The grid of the future allows for seamless adoption of green energy into the grid, allowing us to reduce the country’s carbon footprint, encouraging more steps towards a greener future.


In accordance to the Supply Agreement with Renewable Energy by the ministry, the smart grid is also in place to support our ongoing initiatives to grow renewable energy capacity to 8.3 GW by 2025 (including large hydro of 2.54 GW).

In line with Malaysia’s ratification of the 2015 Paris Agreement, TNB is also committed in our efforts towards a low carbon economy by embracing and supporting renewable energy generation and reducing GHG emissions. In FY2020, we mitigated 5.98 million tCO2e, which is an improvement of 11.4% from last year. We attribute this to our consistent emission mitigation initiatives which include increasing our low carbon and RE generation, energy efficiency measures and tree planting initiatives

Our goal is to achieve a 31% renewable energy generation capacity mix by 2025 (including large hydro), which will contribute to Goal 13 of the UN Sustainable Development Goals (SDG)s Climate Action & Shared Prosperity Vision (SPV) 2030’s Strategic Thrust 6, to promote regional inclusion via green energy accessibility.

As such, we have introduced and implemented some initiatives since 2019 to help us reach our goals:

  1. mGATS
    A platform for corporations (be it renewable energy generators, retailers or customers) to trade energy harvested from renewable sources through the Renewable Energy Certificate (REC).
  2. REC
    As of end 2020, we had sold 483,400MWh of RE certificates (RECs) out of 748,904MWh tradable units, while 120 customers had signed up for 190MWh under myGreen+. The choices that we are making available to customers have effectively created more prosumers, who are more empowered and in control of their consumption.
  3. myGreen+ scheme
    Provides an option for customers to opt for green energy without the high initial investment of a rooftop solar panel, or other forms of renewable energy generation, by offering a premium tariff of 8 sen/kWh in 100 kWh blocks via a subscription certificate issued by TNB. Since its launch in October 2019, the number of myGreen+ subscribers had increased to 120 (2019: 44) with total of ~190 MWh subscription on a monthly basis.
  4. Feed In Tariff (FIT) programme
    Enables owners of solar PV systems with feed-in approvals to supply electricity to the grid at a fixed price. As of end 2020, There were close to 9,500 Feed-in Tariff (FIT) contracts in Peninsular Malaysia, with a total capacity of about 537.0MW.
  5. Net Energy Metering (NEM) scheme
    Allows customers to export excess energy produced from their installed solar PV systems on their premises to the grid on a one-to-one basis. Approximately 3,288 NEM customers were connected to the grid in Peninsular Malaysia with a total capacity of about 265.27MW.


We have set the target of increasing our RE capacity to 8,300MW by 2025, inclusive of large hydro projects. As at end 2020, we had achieved 3,398.2MW of RE capacity, of which 2,732.3MW is within Malaysia and 665.9MW internationally. Domestically, we will focus on the development of more large hydro, rooftop solar and dispatchable RE capacities.

Current green energy project progress:

  1. Hydro

    Our 20th mini hydro electric station located at Sungai Tersat, Kuala Berang, Terengganu, with a designed capacity 4MW is now operational since 2020.

  2. Solar

    i. Large Scale Solar (LSS)

    Since our Reimagining TNB campaign in 2016, we have invested substantially in renewable energy through our participation in LSS programmes, both locally and internationally, to contribute towards low carbon energy generation.

    Meanwhile TNB Renewables Sdn. Bhd. has been shortlisted for the development of 50MW of the fourth large-scale solar (LSS4) at Mentari.

    Currently, 2 LSS farms have been launched and are now operational. The first, in Sepang with a generating capacity of 50MW, which has been running since 2017, and the second in Bukit Selambau, Kedah, being operational since 2019 with a generating capacity of 30MW.

    ii. GSPARX

    Meanwhile, GSPARX, our wholly-owned subsidiary which provides retail self-generation solutions, added another 78.3MW of capacity through the installation of solar rooftop panels under the Net Energy Metering (NEM) and Supply Agreement for Renewable Energy (SARE) schemes. A total of 129 contracts with commercial and industrial customers were secured through SARE, while 292 residential customers acquired solar PV panels through direct purchases. This resulted in a total distributed generation capacity of approximately 81MWp.

    Find out more about GSPARX here.

Foray into international solar market

In the international space, we seek to build our RE portfolio in the United Kingdom (UK), Europe and South-East Asia (SEA). As a measure of our commitment, we will establish a dedicated Renewable Asset Company (RACo) to grow our RE business through acquisitions; and RE Developer Company (ReDevCo) to develop greenfield RE projects as well as provide a pipeline of future operational assets to RACo. For the UK and Europe region, we will be focused on growing our RE business, leveraging our existing assets, capabilities and experience. Whilst in SEA, we will grow TNB’s utility business leveraging off our strengths and capabilities from our Malaysian home base, but customising them for each market. Growth in Singapore and Vietnam is an example of customisation for local needs, through our partnership with Sunseap Group in both markets. Supporting our RE plans, during the year we acquired the remaining 20% shareholding of Tenaga Wind Ventures (TWV) UK Limited (the largest Feed-in-Tariff (FiT) wind portfolio in the UK), and the controlling stake of Vortex Solar Investments S.a.r.l (VSI), (one of the largest solar platforms in the UK with Renewables Obligation Certificate (ROC) subsidy scheme). These two well performing assets will become the seed assets which RACo will leverage for growth, via the acquisition of other operating RE assets in UK and Europe.

Energy Efficiency

Energy Efficiency with LED Streetlights

TNB has introduced the use of Light Emitting Diode (LED) for its streetlights. Most TNB streetlights are installed along the main road to residential areas. Significant improvements in energy efficiency can be seen with 30-40% reduction in the local authorities’ metered streetlight electricity bills.

Electric Vehicle Facilitation

To promote a low carbon economy, we are collaborating with the Malaysian Green Technology and Climate Change Centre (MGTCCC) to expand the network of EV charging stations across the nation, with 329 stations already installed at 223 locations to date and another identified 49 potential sites.

At the end of 2020, there is a total of 73 new ChargeEV stations installed. We have also begun an Electric Vehicle (EV) pilot project in collaboration with SOCAR, as an investment into the technology and business model innovations which are required. This move also provides opportunities to build competency in EV repair and maintenance within TNB itself.

To facilitate EV connections, we have published the EV Connection Guidelines, which includes a dedicated chapter on the interconnection scheme for developers intending to connect EV infrastructure to our network:

Figure 1: A snapshot of EV interconnection scheme available in the EV Connection Guidelines

EV Fleet

We also have several EV Fleet projects in the pipeline:

Project 1: EV Bus

We have deployed EV buses for mass transportation of students around the UNITEN campus in Bangi, as well as transporting TNB staff around Klang Valley.

Project Start Date : May 2018
Project End Date : December 2024

Project Status :

  1. Four (4) EV Buses Purchased
  2. Two (2) EV Buses currently in operation at UNITEN
  3. Two (2) EV Buses under product testing in HQ Bangsar

Project 2: EV Corporate / Pool Vehicles

We have begun gradual replacement of our corporate pool vehicles to EVs as part of our GHG emission reduction initiatives in supporting Green Technology.

Project Status:

  1. Market Research on EV Sedan and EV Van suitable for Corporate use.
  2. Six (6) EV Models tested for technology, specifications, suitability and practicality

Project 3: EV Operational Vehicles

We have also introduced Operational Electric Vehicles as part of a pilot study to analyse the advantages and limitations of using EVs in TNB Operations.

Project Status :

  1. Three (3) units of EV Operational Vehicles purchased
  2. Currently in Production Stage – expected to be delivered by October 2021.

Commercial EV Facilitation

In June 2021, we entered into a Memorandum of Understanding (MoU) with DHL Express Malaysia (DHL) to develop together a greener supply chain.

We will install EV charging stations at DHL’s service centre in Kuala Lumpur, plus several more along selected delivery routes. The MoU includes our cooperation with DHL to invest in energy-efficient equipment, building energy management systems, and rooftop solar panels. TNB is also working with DHL to identify opportunities to enhance DHL’s existing electricity supply to support DHL’s EV logistics aspirations.


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Cyber Security Measures

Digitalizing a grid opens it to the possibility of cyber threats, and thus requires protective measures to keep the power supply uninterrupted, and your data secured.

IT and OT Cybersecurity

TNB increased the cyber resiliency of its IT and OT system by certified power generation, transmission, distribution and digital system with international ISO 27001:2013 Information Security Management System (ISMS) certification. These include the power plant’s Distributed Control System (DCS), Control Centre’s SCADA system and ICT data centre.

To date, we have implemented initiatives to strengthen our online payment security through the Payment Card Industry Data Security Standard (PCI DSS) certification.

The certification required TNB to conduct regular internal and external audits at the certification scope.

Smart meter and AMI system is secure by implementation industry best practise such as Device Language Message Specification/Companion Specification for Energy Metering (DLMS/COSEM (IEC 62056)). Information security in DLMS/COSEM incorporate NIST (National Institute of Standards and Technology) standard in authentication and data security using proven cryptographic algorithms. The increasing needs of the energy market and smart grid is creating more business use cases which require new kinds of data and functions to be supported in meters. The DLMS protocol fares well as it supports not just the consumption data for billing purpose, but it also caters to the new needs of the smart grid such as asset management, outage management, demand response, supply automation and contract management, power quality monitoring, net metering for integrating renewable energy resources, non-technical loss detection, etc.

Advance Distributed Management System (ADMS) together with project implementor are complying with the required OT cyber security standards such as relevant parts of the IEC 62351, and have configured the ADMS in accordance with security hardening best practices based on recommendations from relevant standards, i.e. NIST, NERC CIP, ISA/IEC 62443, IEEE Standard Cyber Security Requirements for Substation Automation, Protection, and Control Systems. Industry best practices for system hardening of OT components are applied to each OT component.

Awards & Recognition:

1. “Cyber Security Project of the Year 2019”
@ Malaysia Cyber Security Awards 2019
Cybersecurity Malaysia

2. “Share Guide Association Malaysia (SGAM) IT Users Group”
@ SGAM ICT Conference & Awards 2019


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Customer Empowerment and Satisfaction

Being in touch with our consumer’s needs is vital to ensure the grid functions and behaves in a smarter manner.

The Customer Satisfaction Survey has been running for the past 25 years to monitor overall performance of TNB’s services. TNB achieved a Customer Satisfaction Index (CSI) of 86% in 2020, after maintaining a score 81% for four consecutive years. This signifies a marked increase in performance of our retail’s service delivery and customer experience. Our focus on increasing service standards is proving effective in giving customers what they really value.

In line with the surge in queries regarding bills during the MCO periods, we operated our CareLine service 24 hours seven days a week.

We also ensured quick response through other engagement channels:

  • Email response: within four hours
  • Facebook response: within two hours
  • Twitter/ Instagram response: within two hours

Access to myTNB app and portal was expanded to include Huawei AppGallery in English and Bahasa Malaysia language options.

We also saw myTNB user registration increased from 1.9 million users in 2019 to 4.5 million in 2020.

Cognisant of our customers’ difficulties brought on by COVID-19, we took this opportunity to introduce targeted assistance:

Residential customers: Provided relief programmes since the beginning of the MCO in April 2020 through Easy Payment Plan (EPP), embargo on disconnections and waiver of interest on late payments

Commercial and industrial customers: Assistance was extended through Deferment of Project Minimum Monthly Charge (PMMC), Waiver for Top-Up and/or Standby Charges for Co-generators, Deferment of Connected Load Charge (CLC) and Waiver of Power Factor penalty for Smart Meter 1 Phase customers

AMI empowering customers during the Covid-19 pandemic

At the height of the first wave of the Covid-19 pandemic, the government had ordered the entire nation into a complete lockdown, also known as the Movement Control Order (MCO). During this period, customers throughout the nation experienced higher than usual energy consumption due to staying at home for extensive amounts of time. In most cases, customers only became aware of their high energy consumption towards the end of the MCO period as most meter readers were discontinued to visit homes in the interest of the customers and meter readers safety. Hence, they were unable to render electricity bills to the customers. Thankfully, customers equipped with smart meters were much better prepared to cope with the higher than normal consumptions, as the smart meters allowed them to monitor their usage closely in near real-time throughout the pandemic through myTNB app. The current AMI implementation enabled installed smart meter customers to monitor, manage their energy consumption and receive their electricity bill during the pandemic.


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