News Release SP Group starts trial of vehicle-to-grid integration to pave the way for greater EV adoption Singapore, 8 July 2021 – SP Group (SP) today announced the start of its trial of vehicle-togrid 1 (V2G) technology. A first in Southeast Asia, SP will test and verify the possibility of tapping energy stored in electric vehicles (EVs) to enhance grid reliability to cater for the demand on the power grid to support more than 600,000 2 vehicles when Singapore phases out Internal Combustion Engine vehicles by 2040. When charged, an electric vehicle stores energy in its Lithium-ion batteries. The vehicular batteries can act as small Energy Storage Systems (ESS). When renewable energy sources such as solar power fluctuate due to weather conditions, these ESSs can be a key solution to transfer energy back to balance the power grid. If V2G technology is proven viable, it can be a win-win for the electricity system and EV owners, acting as a cost-effective solution to supplement the larger ESSs to overcome intermittency while EV owners can be paid for use of the EV batteries when needed. As the national power grid operator and a leading player in sustainable energy solutions, SP Group is taking the lead to harness V2G technology and cater for this increased demand while maintaining world-class reliability and stability of the grid. SP is providing four V2G charging points at SP’s premises for the trial which will be completed in June 2022. It seeks to demonstrate V2G capability and applications including frequency regulation, the injection of power from EVs to reduce demand from traditional sources, mitigation of too high or low voltage in the distribution system, and EV charging during peak and off-peak periods. 1 Vehicle-to-grid or V2G enables the charged power to be pushed back to the power grid from the battery of an electric car to balance variations in energy production and consumption. 2 Source: Land Transport Authority, 2020 1 Mr Stanley Huang, Group CEO, SP Group, said: “Our trial of vehicle-to-grid integration is another step towards supporting Singapore’s green energy transformation. At SP, we have dual roles to play. As the national grid operator, we are building a resilient and smart grid for the future, ensuring that our energy system caters to the increased load due to the conversion to EVs. To empower a sustainable energy future, we are proactively investing in and leveraging smart energy solutions to enhance our grid’s capacity for renewable energy sources.“ SP announced its investment in The Mobility House (TMH) in September 2020 to explore vehicle-to-grid feasibility, and is increasing its investment in the V2G technology leader in Europe. Operating from Munich, Zurich and Belmont (California), TMH provides a nonproprietary software for integrating vehicle batteries into power grids, using intelligent charging and storage solutions. What is vehicle-to-grid? • V2G technology allows energy transfer between the batteries within an EV and the power grid. This is more sophisticated than uni-directional charging of EVs. • The application of V2G technology could balance and support our energy grid. • Renewables such as solar power is intermittent and managing this intermittency is important to ensure a stable power supply to customers. Mitigating intermittency has traditionally been performed by power plants. With energy storage solutions integrated with V2G technology, customers are able to contribute as well. When solar generation drops due to rain or cloud cover, the EVs plugged into the system can balance out the fall in supply. During periods of significant solar generation, the EVs can store the excess energy. • With a well-functioning V2G landscape, customers can play a more active role and our energy system would be able to accommodate larger capacities of renewable energy. -Ends- 2 Photos Mr Jimmy Khoo, CEO of SP PowerGrid, with the V2G-capable Nissan LEAF and V2G bidirectional charger that had just arrived in Singapore for the trial. Nissan LEAF – V2G Battery Li-ion / 40 kWh Motor Power Output 110 kW (148 HP) Driving Range 311 km (full charged) EV Charging Port Type 2 (AC) / ChaDeMo (DC) V2G Bi-directional Charger 3 Max DC Output Power 10kW DC Output Voltage Range 170 – 500V DC Max DC Output Current 28 A DC Power Factor (> 50% load) ‣ 0.99 Efficiency DC Plug 98% at full load Plug 1 Plug 2 CCS IEC 62 196-3 JEVS G105 About SP Group SP Group is a leading utilities group in the Asia Pacific, enabling a low-carbon, smart energy future for its customers. It owns and operates electricity and gas transmission and distribution businesses in Singapore and Australia, and sustainable energy solutions in Singapore and China. As Singapore’s national grid operator, about 1.6 million industrial, commercial and residential customers benefit from its world-class transmission, distribution and market support services. These networks are amongst the most reliable and cost-effective world-wide. Beyond traditional utilities services, SP Group provides a suite of sustainable and renewable energy solutions such as microgrids, cooling and heating systems for business districts and residential townships, solar energy solutions, electric vehicle fast charging and digital energy solutions for customers in Singapore and the region. For more information, please visit spgroup.com.sg or for follow us on Facebook at fb.com/SPGroupSG, on LinkedIn at spgrp.sg/linkedin and on Twitter @SPGroupSG. 4

11 September 2014 For Immediate Release MEDIA RELEASE ADVISORY ON SCAM EMAIL 1. There have been reported cases of individuals receiving emails from a sender titled ‘SP Services Offer’ claiming to provide refunds on their utilities bills. The Appendix contains a screenshot of such an email for reference. 2. These email messages are not from SP Services. Recipients of such emails are advised not to respond to the email, click on the hyperlink or provide their personal information. 3. SP Services would like to assure its customers that no unauthorised access has been made into its systems, and utility accounts and personal information that reside in SP Services’ system have not been compromised. 4. SP Services has made a police report regarding this. 5. For enquiries, please contact SP Services at 1800 222 2333 or email spservices@singaporepower.com.sg. _______________________________________________________________________________________________________ Issued by: SP Services Limited 10 Pasir Panjang Road #03-01 Mapletree Business City Singapore 117438 Co. Reg No : 199504470N www.spservices.com.sg SP Services Ltd 10 Pasir Panjang Road #03-01 Mapletree Business City Singapore 117438 Tel (65) 6378 8888 www.spservices.com.sg Co. Registration No.: 199504470N Appendix Example of scam email From: SP Services Offer [mailto:info@offer-chic.com] Sent: Friday, 29 August, 2014 10:03 AM To: Subject: SGD35 Discount on your next bill! If this e-mail is not displayed properly, click here. GET $35 CASHBACK FOR $1 ONLY Enjoy $35 Cashback for $1 only GET THIS OFFER & EARN $35 CASHBACK SP Services Ltd 10 Pasir Panjang Road #03-01 Mapletree Business City Singapore 117438 Tel (65) 6378 8888 www.spservices.com.sg Co. Registration No.: 199504470N For $1 only enjoy this cashback! Keep the receipt & we will refund you. ENJOY DISCOUNTS WITH YOUR DISCOUNT CARD This card is your pass to endless privileges. Get 45% discount on dining, drinking, wellness & travelling! GET 45% DISCOUNT AT PREMIUM SPOTS Enjoy Can't-Miss spots in Singapore & get access to VIP parties, events & new openings in town. a. HOW TO CONTACT US? BY PHONE (+65) 6361 0889 Monday - Friday, 10am to 6pm BY EMAIL b. TERMS OF SERVICE The $1 offer is a 48 hours Trial. To start the Trial we will require you to provide your payment details. At the end of the Trial, we will automatically start to charge you for the $79.90 membership subscription on the first day following the end of the Trial, you will be charged every three months the amount of $79.90 ($26.63 per month). By providing your payment details in conjunction with the Trial, you agree to this charge. c. Sign up Selection How It Works SP Services Ltd 10 Pasir Panjang Road #03-01 Mapletree Business City Singapore 117438 Tel (65) 6378 8888 www.spservices.com.sg Co. Registration No.: 199504470N

news Electric cars to get 500 charging points by 2020 SP Group to build Singapore’s largest public electric vehicle charging network ADRIAN LIM, TRANSPORT CORRESPONDENT Energy utilities provider SP Group plans to build 500 charging points for electric vehicles islandwide by 2020. The points will be placed at housing estates, shopping malls, industrial sites and business parks, the firm announced yesterday. While other companies such as Greenlots, Red Dot Power and BlueSG are already in the market, SP Group said its network will be the largest one fully accessible to the public. More than 100 of the charging points will be of the direct current type with a 50 kilowatt power rating that can fully charge a vehicle in as little as 30 minutes. SP Group said there are fewer than five direct current charging points here now. Most points use alternating current, and a lower 7.4kw rating, which takes the car about seven times longer to be fully charged. An app will allow motorists to pay for charging electronically while also getting updates on the availability of charging points. Details on pricing will be disclosed closer to the end of the year, when SP Group sets up its first 30 charging points. These will be a mix of the alternating current and direct current types. There were 592 electric and plug-in hybrid cars on the road here as at the end of last month, about 0.1 per cent of the total car population of 613,383. There are SP Group says its network will be fully accessible to the public. TNP PHOTO: KEVIN LIM also 31 electric-powered goods and commercial vehicles. “There is a chicken-and-egg conundrum when it comes to electric vehicle adoption... Many prospective drivers are concerned about the lack of a pervasive charging network,” said Mr Goh Chee Kiong, head of strategic development at SP Group. He added that some have “range anxiety” – the fear that the electric vehicle will run out of battery power in the middle of a journey. Owners tend to install their own charging points if they live in landed properties or get their condominium management to have stations set up, said Mr Terence Siew, president of the Electric Vehicle Association of Singapore. There are 30 condos with charging points. There will be more public choices available down the road. Charging infrastructure specialist Greenlots operates 16 publicly accessible charging stations, with aims to lift that to 50 by the end of this year. Electricity retailer Red Dot Power announced a partnership in February with PlugIT, a Finnish charging technology specialist, to install at least 50 charging stations by the end of next year. BlueSG, which runs an electric vehicle-sharing programme, aims to build 2,000 charging points by 2020, and make 400 of them available to the public. Electric vehicles generally cost more than comparable combustion engine cars, but Mr Siew said this will change as battery prices drop with mass production and economies of scale. “Electric vehicles will be cost competitive with normal cars,” he added. adrianl@sph.com.sg

Consumption_Elect Average consumption of Electricity (kWh) Premises Types Feb-25 Mar-25 Apr-25 May-25 Jun-25 Jul-25 Aug-25 Sep-25 Oct-25 Nov-25 Dec-25 Jan-26 HDB 1-Room 121 119 128 136 150 143 150 136 136 144 127 124 HDB 2-Room 161 156 169 181 195 190 195 177 177 188 164 165 HDB 3-Room 231 231 250 265 284 273 280 257 259 271 242 239 HDB 4-Room 320 309 341 363 390 381 388 358 355 377 334 330 HDB 5-Room 374 359 399 425 457 450 459 423 417 444 392 386 HDB Executive 458 445 495 522 562 554 562 520 513 546 478 472 Apartment 419 417 476 516 548 536 541 513 501 538 500 451 Terrace 744 714 775 823 881 848 866 817 818 836 785 734 Semi-Detached 974 960 1,031 1,080 1,173 1,123 1,121 1,072 1,056 1,107 1,016 951 Bungalow 1,872 1,904 2,016 2,154 2,244 2,175 2,168 2,190 2,074 2,202 2,040 1,950 Note: The figures exclude electricity consumption for PAYU customers and customers who are not purchasing electricity at the regulated tariff.

News Release SP GROUP PARTNERS NEW LANDLORDS, INCREASING ITS EV CHARGING NETWORK TO 200 POINTS • Greater convenience for EV drivers with new charging points in the Central Business District, Orchard Road, Sentosa and Paya Lebar Singapore, 9 September 2019 – SP Group (SP) has increased its high-speed electric vehicle (EV) charging network to 200 points across Singapore, including 52 direct current (DC) fast chargers. This comes after SP partnered landlords such as CapitaLand Group, City Developments Limited, Lendlease, Resorts World Sentosa and Soilbuild Group Holdings Ltd to install charging points at select properties. This round of expansion has enabled SP to deliver the largest and fastest public EV charging network in Singapore. SP is targeting 1,000 charging points, of which 250 will be high-speed DC chargers by end of 2020. The new charging points will bring greater convenience to EV drivers, especially with the DC chargers that can charge a car in 30 minutes. Among them are Singapore’s first DC charging points in the Central Business District (CBD). Other new charging locations include Orchard Road, Sentosa and Paya Lebar. Mr Goh Chee Kiong, Head, Strategic Development, SP Group, said, “Our aim is to drive green mobility in Singapore. By building the largest and fastest public EV charging network island-wide, we reduce range anxiety and shorten the time needed to charge the vehicles. Our latest partnerships reflect the strong momentum by property owners to welcome EVs. This will provide greater convenience for EV drivers who can charge their vehicles while at work, shopping or at play.” EV drivers visiting the Orchard Road shopping district, can now charge their cars at Shaw Centre. Republic Plaza has become the first commercial building in the CBD to host a fast charger. Resorts World Sentosa is hosting Sentosa’s first fast chargers. The eastern region of Singapore has a major boost in coverage with a cluster of 20 charging points at Paya Lebar Quarter. (Please refer to the Annex for a list of new charging locations) Drivers can tap on SP Group’s EV charging service through the SP Utilities mobile application, where they can search for the nearest charging points, receive updates on their charging sessions and make payment. Quotes from our partners Ms Lynette Leong, Chief Sustainability Officer for CapitaLand Group, said, “With 44 EV charging points across 11 properties, SP Group is CapitaLand’s largest EV charging partner. CapitaLand leverages our expansive footprint in Singapore to effect positive change for the environment. The unrivalled network of EV charging stations complements our well-connected and well-located properties, encouraging our customers to adopt sustainable mobility solutions in Singapore. Sustainability is an integral part of CapitaLand’s business. From greening our portfolio, designing our buildings to encourage cycling, to encouraging our customers to reduce and recycle their waste, we continue to expand our efforts to enable the community to lead more sustainable lifestyles.” Ms Esther An, Chief Sustainability Officer of CDL, said, “As a property developer and advocate of sustainable development, CDL has always been committed to embracing technology and solutions that reduce environmental impact. With the world and Singapore moving towards a low-carbon economy, the transition to EVs is accelerating. We hope that our partnership with SP will help to further propel the EV movement in Singapore. Through this timely and innovative initiative, CDL’s flagship Republic Plaza will be the first commercial building in Singapore’s CBD to have a DC fastcharging point, bringing greater convenience to EV drivers. In addition, our Tagore 23 Warehouse at Tagore Lane will also join SP’s growing network of EV charging points. CDL will continue to explore various initiatives and innovations in the clean mobility space to build a more sustainable city for the future.” Mr Richard Paine, Managing Director of Paya Lebar Quarter, said, “We are very pleased to work with the SP Group with the enabling infrastructure for EVs at PLQ. We see EVs as representing a better environmental solution for cars in Singapore and are already seeing demand from our PLQ office tenants for EV charging stations.” About SP Group SP Group is a leading energy utilities group in the Asia Pacific. It owns and operates electricity and gas transmission and distribution businesses in Singapore and Australia, and district cooling businesses in Singapore and China. SP Group is committed to providing customers with reliable and efficient energy utilities services. About 1.5 million industrial, commercial and residential customers in Singapore benefit from SP Group’s world-class transmission, distribution and market support services. These networks are amongst the most reliable and cost-effective world-wide. SP Group also drives digital solutions to empower customers to manage their utilities, reduce consumption and save cost. For more information, please visit spgroup.com.sg or follow us on Facebook at fb.com/SPGroupSG and on Twitter @SPGroupSG. ANNEX: List of new charging locations No. Building Name Address 1 5 Science Park Drive 5 Science Park Drive, Singapore Science Park 1, Singapore 118265 2 CapitaSpring 86, 88 Market Street, Singapore 048948 3 Goldbell Engineering (Tuas 8 Tuas Avenue 18, Singapore 638892 Service Centre) 4 IMM 2 Jurong East Street 21, Singapore 609601 5 Infinite Studios 21 Media Circle, Singapore 138563 6 Nordic European Centre 3 International Business Park, Singapore 609927 7 Paya Lebar Mall 10 Paya Lebar Road, Singapore 409057 8 Paya Lebar Quarter 1 & 2 1 Paya Lebar Link, Singapore 408533 9 Paya Lebar Quarter 3 2 Tanjong Katong Road, Singapore 437161 10 Republic Plaza 9 Raffles Place, Singapore 048619 11 Resorts World Sentosa 8 Sentosa Gateway, Singapore 098269 12 Shaw Centre 1 Scotts Road, Singapore 228208 13 Tagore 23 Warehouse 23 Tagore Lane, Singapore 787601 14 The Meissa 100D Pasir Panjang Road, Singapore 118520 15 Vantage Automotive 305 Alexandra Road, Singapore 159942 16 West Park BizCentral 32 Pioneer Crescent, Singapore 628555

The Straits Times, 5 March 2015

Media Coverage Catch the latest news on SP All Years 18 May 2022 The Business Times - SP Group in US$370m deal that can cut emissions by up to 120,000 tonnes a year Source: The Business Times © Singapore Press Holdings Limited. Permission required for reproduction. 08 May 2022 The Business Times - SP Group donates S$1.35m to support 450 disadvantaged ITE students The Business Times © Singapore Press Holdings Limited. Permission required for reproduction. 20 Apr 2022 Lianhe Zaobao - Marina Bay District Cooling Network to be expanded Source: Lianhe Zaobao © Singapore Press Holdings Limited. Permission required for reproduction. 20 Apr 2022 The Straits Times - Jurong Lake District to get centralised cooling system Source: The Straits Times © Singapore Press Holdings Limited. Permission required for reproduction. 20 Apr 2022 The Business Times - Five more buildings opt in on Marina Bay district cooling network Source: The Business Times © Singapore Press Holdings Limited. Permission required for reproduction. 18 Apr 2022 Lianhe Zaobao - Tampines to build district cooling network and help 7 buildings achieve energy savings Source: Lianhe Zaobao © Singapore Press Holdings Limited. Permission required for reproduction. 18 Apr 2022 The Business Times Online - SP Group to invest S$40-60m in new district cooling system Source: The Business Times Online © Singapore Press Holdings Limited. Permission required for reproduction. 18 Apr 2022 The Straits Times - Tampines to get cooling system by 2025 Source: The Straits Times © Singapore Press Holdings Limited. Permission required for reproduction. 12 Apr 2022 The Straits Times - 450 ITE engineering students to benefit from new study award Source: The Straits Times © Singapore Press Holdings Limited. Permission required for reproduction. 12 Apr 2022 Lianhe Zaobao - SP Group sets aside $1.35m to set up Awards, 450 ITE students to benefit Source: Lianhe Zaobao © Singapore Press Holdings Limited. Permission required for reproduction. 1 ... 13 14 15 ... 47

Singapore Power Wins Smart Grid Project of the Year with Silver Spring Networks Partners Achieve Flexible Countrywide Deployment of 21st Century Energy Infrastructure Through Silver Spring IPv6 Platform with MicroAP Technology Kuala Lumpur, Malaysia – September 12, 2014 – Singapore Power (SP) won the ‘Smart Grid Project of the Year’ award at the Asian Power Awards 2014 today, for its programme with Silver Spring Networks, Inc. (NYSE: SSNI) to enable deregulated energy services in Singapore. This was enabled by SP's successful deployment of a smart infrastructure networking platform, with nation-wide coverage, through Silver Spring’s IPv6 technology. Since April 2014, SP has successfully begun delivering deregulated energy services to 15,000 commercial and industrial (C&I) customers, in support of the Singapore government’s policy to progressively liberalise the retail electricity market. In addition, SP leveraged Silver Spring’s MicroAP Technology and a RF mesh canopy network to reach geographically dispersed customers, and maintain 99.5% meter read success rate. This helps SP ensure reliable communications from anywhere, at all times. “The ‘Smart Grid Project of the Year’ award recognises Singapore Power for delivering reliable and efficient energy services to consumers. Through the deployment of new technology, SP has empowered our customers with more choice and the ability to better manage their energy usage, so as to achieve savings on electricity bills,” said Peter Leong, Managing Director, SP PowerGrid. “Silver Spring Networks is a key partner in the implementation of this country-wide platform. Through such partnerships, Singapore Power can continue to deliver greater value to Singapore consumers.” “We congratulate Singapore Power on today’s win and are happy to partner with them to deploy world-class infrastructure that helps deliver lower prices and greater choice to their customers,” said Eric Dresselhuys, EVP of Global Development and Sales, Silver Spring Networks. “Utilities across Asia can look to Singapore Power as a best practice example for how to deploy smart grid services. Their sophisticated network canopy delivers scalable smart grid and smart city applications to help drive energy efficiency and new services for consumers for years to come.” About Singapore Power Singapore Power Group (SP) is a leading energy utility group in the Asia Pacific. It owns and operates electricity and gas transmission and distribution businesses in Singapore and Australia. More than 1.4 million industrial, commercial and residential customers in Singapore benefit from SP’s world-class transmission, distribution and market support services. The networks in Singapore are amongst the most reliable and cost-effective worldwide. For more information, please visit www.singaporepower.com.sg. About Silver Spring Networks Silver Spring Networks is a leading networking platform and solutions provider for smart energy networks. Silver Spring’s pioneering IPv6 networking platform, with over 19 million Silver Spring enabled devices delivered, is connecting utilities to homes and business throughout the world with the goal of achieving greater energy efficiency for the planet. Silver Spring’s innovative solutions enable utilities to gain operational efficiencies, improve grid reliability, and empower consumers to monitor and manage energy consumption. Silver Spring Networks’ customers include major utilities around the globe such as Baltimore Gas & Electric, CitiPower & Powercor, Commonwealth Edison, CPS Energy, Florida Power & Light, Jemena Electricity Networks Limited, Pacific Gas & Electric, Pepco Holdings, Progress Energy and Singapore Power, among others. To learn more, please visit www.silverspringnet.com. # # # # Forward-Looking Statements This press release contains forward-looking statements about Silver Spring Networks’ expectations, plans, intentions, and strategies, including, but not limited to statements regarding Silver Spring Networks’ engagement with Singapore Power, and the benefits of that engagement to SP and its customers. Statements including words such as "anticipate", "believe", "estimate", "expect" or “future” and statements in the future tense are forwardlooking statements. These forward-looking statements involve risks and uncertainties, as well as assumptions, which, if they do not fully materialize or prove incorrect, could cause our results to differ materially from those expressed or implied by such forward-looking statements. The risks and uncertainties include those described in Silver Spring Networks' documents filed with or furnished to the Securities and Exchange Commission. All forwardlooking statements in this press release are based on information available to Silver Spring Networks as of the date hereof. Silver Spring Networks assumes no obligation to update these forward-looking statements.

Consumption_Water Average consumption of Water (CuM) Premises Types Dec-23 Jan-24 Feb-24 Mar-24 Apr-24 May-24 Jun-24 Jul-24 Aug-24 Sep-24 Oct-24 Nov-24 HDB 1-Room 7.8 7.8 8.0 8.3 8.4 8.1 7.7 7.5 8.1 8.3 7.9 8.1 HDB 2-Room 9.3 9.3 9.3 9.7 10.0 9.5 8.7 8.7 9.4 9.5 9.2 9.3 HDB 3-Room 12.0 12.0 12.2 12.8 12.9 12.0 11.5 11.6 12.4 12.5 12.2 12.2 HDB 4-Room 15.1 15.0 15.5 16.2 16.3 15.3 14.7 14.6 15.6 15.7 15.3 15.5 HDB 5-Room 16.4 16.1 16.7 17.8 17.7 16.7 16.0 15.6 16.9 17.1 16.7 17.0 HDB Executive 18.1 18.1 18.8 19.9 19.7 18.6 17.7 17.7 18.8 19.1 18.5 18.8 Apartment 13.1 12.8 13.1 14.4 14.3 13.2 12.7 12.5 13.1 13.8 13.8 13.8 Terrace 25.2 24.3 25.8 28.0 28.4 24.2 24.1 24.7 25.7 26.7 25.9 26.2 Semi-Detached 30.4 30.0 30.7 34.9 34.6 30.2 28.3 30.0 31.5 33.4 31.4 32.2 Bungalow 48.6 49.4 46.3 59.5 58.1 50.4 42.1 49.6 48.1 54.7 52.4 52.4

Consumption_Gas Average consumption of Gas (kWh) Premises Types Dec-23 Jan-24 Feb-24 Mar-24 Apr-24 May-24 Jun-24 Jul-24 Aug-24 Sep-24 Oct-24 Nov-24 HDB 1-Room 36 38 38 37 38 35 34 33 35 35 34 35 HDB 2-Room 36 37 38 38 40 37 34 34 36 36 34 35 HDB 3-Room 49 50 52 53 56 50 48 47 51 51 49 50 HDB 4-Room 61 61 64 66 69 62 58 58 62 63 61 62 HDB 5-Room 67 65 70 73 77 68 64 63 69 70 68 69 HDB Executive 70 70 74 78 82 73 68 68 72 74 72 73 Apartment 83 85 91 94 93 80 76 77 82 86 88 88 Terrace 103 100 108 120 114 93 97 98 98 105 107 108 Semi-Detached 118 115 120 133 130 117 105 115 115 120 117 120 Bungalow 200 213 192 220 234 209 168 197 185 198 206 202

A6 TOPOF THENEWS | THE STRAITS TIMES | WEDNESDAY, DECEMBER 20, 2017 | Singapore’s deepest tunnel system The Underground Transmission Cable Tunnel Project will safeguard Singapore’s electricity supply network for the future. It will begin operations by the end of next year. ST illustrates the key points of this $2.4 billion engineering feat. UNDERGROUND TUNNELS 3m Sewage and current power grids 12m Underpass and malls Robots on the lookout for water leaks and fires 1.7m 6m Automatic inspection vehicle 60m SP Group electricity cable tunnels 8-25m Underground expressways 30m MRT tunnels 20-55m Deep tunnel sewerage system 60m Height of a 20-storey HDB block WHERE THE NEW TUNNELS LIE Existing power circuits to be renewed Gambas Woodlands Avenue 8 Ayer Rajah Senoko Cable renewal routes Kallang Basin Tampines Paya Lebar 400kV substation Automatic inspection vehicles will be traversing the length of the 40km tunnels Jose Hong Singapore’s new electricity supply tunnels have the latest high-tech sensors to detect water seepage, fires and infiltration that could harm the electricity network. Robots, or automatic inspection vehicles (AIVs), traversing the length of the 40km tunnels, will look out for changes in the colour of the concrete walls, a warning sign for water leaks. Mr Michael Chin, managing director of infrastructure and projects at energy utility company SP Group, said yesterday that water leaks are the most common problem in tunnels, and AIVs can detect concrete patches that suddenly turn a different colour. He said the AIVs will also eventually be able to detect fires using infrared cameras. Each of the three tunnels also has a firefighting system that uses a superior “water mist system”, instead of sprinklers, said Mr Chin. He explained that the system shoots very fine water mist which evaporates faster and removes heat quickly from fire. The water mist also displaces air and suffocates the flames. Smoke particles will dissolve into the fine water droplets and sink, leaving a fine mist and making it safe for firefighters to enter the tunnel to put out the fire, said Mr Chin. The system also sends an alarm signal to the Singapore Civil Defence Force. Another set of sensors in the tunnels can detect pollutants and abnormal concentrations of gases. Most parts of the multibillion-dollar Underground Transmission Cable Tunnel Project are about 60m beneath the earth, but some will be at 80m, making the electricity project one of the world’s deepest. The tunnels – named the North-South, East-West and Jurong Island-Pioneer tunnels – will be able to house 1,200km of extra-high-voltage cables. Singaporeans will begin tapping this source from next year, said SP Group yesterday. About 500km of cables will be laid, which is less than half the capacity of the tunnels. There will be 17 equipment buildings spanning the 40km network, and each of them will have two electric bicycles to allow staff to quickly move to parts of the tunnels that require attention. Mr Chin said that anyone trying to enter the tunnels will need to break through three layers of security at the equipment buildings. “All these systems protect the cables and the people working in the tunnel and so, in the long run, maintain the reliability of the system,” he said. josehong@sph.com.sg SCAN TO WATCH A walk through the underground tunnels. http://str.sg/ tunnels West Jurong Island 400kV substation Ayer Rajah 400kV substation Rangoon 400kV substation FACTS AND FIGURES 3 21 tunnels shafts long 60-80m deep 40km tunnel High-tech protection There are only 17 entry points to the tunnel, and each of them has three levels of security and surveillance cameras. The tunnels also have systems that protect against fire and water seepage. Long-term planning There is space to lay 1,200km of cables in the tunnels – more than thrice the distance between Singapore and Kuala Lumpur. However, by 2022, SP Group will lay only around 500km of cables, leaving plenty of space for expansion. Long-lasting supply The tunnels are built to last 120 years. This refers to the concrete segments and the structural reinforcements. Source: SP GROUP PHOTOS: ZAOBAO, HDB STRAITS TIMES GRAPHICS A prototype of the automatic inspection vehicle that will be used to detect water seepage and fires in the tunnel system. PHOTO: LIANHE ZAOBAO Tunnel system replaces ageing network of the 1980s Eight circuits of the power cable network, which were built in the 1980s, will soon become too old to maintain and will be left in place while being gradually replaced with the new tunnel system. These cables were installed just below roads, and repairs and replacement work would cause traffic jams and increase the risk of accidents – problems that the new underground tunnel network will avoid, said SP Group managing director of infrastructure and projects Michael Chin. He added that the existing cables are so old that they need to be inspected once every three months, which adds to maintenance costs. Singapore’s land scarcity means that SP Group had “no choice” but to build the tunnel system 60m below ground, said Mr Chin. He said that the 60m-deep tunnels mean that cable checks will not disrupt ground-level life. Reflecting long-term planning, Mr Chin said the 40km tunnel project is designed to last 120 years. This refers to the concrete segments and the structural reinforcements. However, he said that there is no knowing what will happen once the system ends. “I will not be around and you will not be around,” he chuckled, adding that Singapore could end up with a completely different system of transmitting electricity. Jose Hong

ENERGY & COMMODITIES SP Group signs MOU with BCG Energy to invest in renewables in Vietnam � MON, MAY 24, 2021 - 12:02 PM GAYLE GOH � gaylegoh@sph.com.sg NATIONAL grid operator SP Group (SP) and BCG Energy announced on Monday that they have signed a memorandum of understanding (MOU) to invest in renewable energy projects in Vietnam. The MOU provides an exclusive right for SP to acquire up to 49 per cent of Skylar Joint Stock Company (Skylar), a subsidiary of BCG Energy. Skylar specialises in the development and deployment of solar assets on factories and industrial zones across Vietnam. It currently has 61.1 megawatt-peak (MWp) of rooftop solar assets in operations across 14 provinces in Vietnam, according to the press statement by SP and BCG Energy. Under the partnership, SP and BCG Energy will also "jointly explore opportunities to invest in other solar power projects" to enhance Vietnam's electricity supply capacity, and support Vietnam's goal of increasing the rate of electricity produced from renewable energy sources to about 30 per cent by 2030, said the statement. Founded in 2017, BCG Energy is a wholly-owned subsidiary of Bamboo Capital JSC, which is listed on the Ho Chi Minh Stock Exchange. BCG Energy focuses on the development and operation of ground-mounted and rooftop solar assets in Vietnam. As part of its aim to achieve 2.0 GW of capacity by 2023, the company intends to diversify into oating solar, wind power, and LNG projects in the future. "Vietnam is a key strategic market for SP and this collaboration with BCG Energy will create a strong platform for us to invest in renewables projects by leveraging the strengths of both parties," said Stanley Huang, SP's group chief executive o cer, on the signing of the MOU. SP, Singapore's national utility, owns and operates electricity and gas businesses in Singapore and Australia, as well as sustainable energy solutions in Singapore and China. SP established its Vietnam o ce in Ho Chi Minh City last November. SP GROUP RENEWABLE ENERGY VIETNAM