Questions/Answers

Dubai Electricity and Water Authority (DEWA) substation is a standard 132-kilo volt/ 11 kilo volt substation consists of 132KV Gas insulated switchgear of 8 feeders and 3 No.s of transformer. Gas insulated switchgear are filled with SF6 (Sulphur Hexa fluoride) gas. 132KV cables are connected to transfer power from Gas insulated switchgear (GIS) to transformer. In order to test 132KV cables, DEWA followed the standard recognized 25 years practice of performing the cable High voltage test (To check the healthiness of cable) between Gas Insulated Switchgear and transformer by mounting test adaptor device on each bay independently ( total 3 times since 3 number of bays) which involves 428 KG’s of SF6 gas works per substation. The main objective was to reduce the environmental impact to reduce the usage of SF6 gas with present practice. Action for improvement were prepared for the pilot project. Team members assigned with responsibilities. Team studied in details of different option of pros and cons of new methods to reduce the usage of SF6 gas. Specific objectives: Sustainable initiative (To reduce environmental impact by reducing the usage of SF6 gas works by 85%). 2. cost saving. 3. Happy society and Happy stakeholders.

The innovation of enhanced design and testing method of high voltage test resulted in optimized usage of SF6 gas work, which saves the environment (avoids SF6 gas emission to ozone) is the key element change from the previous method. The innovative method is a breakthrough and first kind of new methodology of testing in GCC, which is contributing to sustainability. Team plan to conduct Benchmarking studies with other utilities to utilize this method. Overall industry level, due to 85%consumption of SF6 gas reduced, the production of SF6 gas will be reduced in the industry and its remarkable breakthrough in contribution to sustainable goals on climate action and responsible consumption and production.

SDGs- Responsible consumption and Production Team formed under the theme sustainability to develop the innovative method on testing of High Voltage cables in 132-kilo volt DEWA substation. The team main objective was to reduce the environmental impact to reduce the usage of SF6 gas with present practice. In addition to main objectives, team also focus in cost saving, optimize risk, happy stakeholder and happy society. Action for improvement were prepared for the pilot project. Team members assigned with responsibilities. Team studied in details of different option of pros and cons of new methods to reduce the usage of SF6 gas. Team Suggested combining all bays cable High Voltage test together by mounting test adaptor device on common place in switchgear instead of 3 times from each bay independently which simplify the process and reduced the usage of 85% SF6 gas works. Detailed study conducted by team on new testing method with each manufacturer. Feedback and confirmation obtained from all stakeholders to implement the project (sustainable solution) for all ongoing and future (200 No. s of substation). Challenges like technical vulnerability, original manufacturer confirmation on newly proposed method were overcome. Team initially plan to implement the project for 10 numbers of selected on-going substation, which was successfully tested and completed. Accordingly, as per the project master plan, team implemented the suggestion and executed in running projects after getting concurrence from concerned stakeholders

Usage of SF6 gas works reduced by 85% (4280 Kg's of SF6 gas works reduced per 10 Substation equals to 97,584 tonnes of Co2 avoided). 2. Green Environment (21,400 cars emission avoided in Dubai city for a whole year) 3. Cost saving of USD 3.26 million per 10 numbers of Substation. 4. Happy stakeholders (Resources, cost, time saved (328 man-days saved). Developer/customer- project work commissioned on time prior to ahead of schedule. Society- Green environment- Manufacturer/contractor – Work simplified, less consumables, man-days, cost and resource saving. Dewa- Increase productivity, cost saving, resource saving, Happy stakeholders 5. Happy society (21,400 cars emission avoided in the Dubai city for a whole year).

DEWA has pledged As a public service Goverment enterprise, DEWA has taken initiative in reduction of environmental usage in core business activity. This project is a breakthrough and first kind of new innovative testing methodology globally on testing of high voltage cables, which is contributing to environment. This project contributed to global sustainable development goals of responsible consumption and production, climate action under the sustainability pillar “Environmental”. contribution to UN SDGs goal.

DEWA and its initiative always address gender equality. The team formed to study this initiative has give equal rights in gender equality

The target group is to reduce the environmental impact. The initiative improved outcomes of target groups as below Usage of SF6 gas works reduced by 85% (4280 Kg's of SF6 gas works reduced per 10 Substation equals to 97,584 tonnes of Co2 avoided). 2. Green Environment (21,400 cars emission avoided in Dubai city for a whole year) 3. Cost saving of USD 3.26 million per 10 numbers of Substation. 4. Happy stakeholders (Resources, cost, time saved (328 man-days saved per 10 substation).

Team Suggested combining all bays cable High Voltage test together by mounting test adaptor device on common place instead of 3 times which simply the process and reduced the usage of 85% SF6 gas works. Detailed technical study conducted against each original equipment manufacturer including factory visit.Meeting were condcuted with all stakeholders in applying the high voltage through switchgear bus bars instead of applying only to cable chamber. Feedback and confirmation obtained from all stakeholders to implement the project (sustainable solution) for all ongoing and future (200 No. s of substation). Challenges like technical vulnerability, original manufacturer confirmation on newly proposed method were overcome. Team initially plan to implement the project for 10 numbers of selected on-going substation, which was successfully tested and completed. Accordingly, as per the project master plan, team implemented the suggestion and executed in running projects after getting concurrence from concerned stakeholders.

• Stakeholder acceptance including OEM confirmation required- • Suggesting an alternate method instead of proven world wide practice of 25 years • Will it be Technically acceptable ? IEC recommended this method? Initiated and Coordinated meeting with concerned stakeholders. Concurrence obtained from stakeholder including OEM.Detailed technical study conducted against each original equipment manufacturer including factory visit.Meeting were conducted with all stakeholders in applying the high voltage through switchgear bus bars instead of applying only to cable chamber. Feedback and confirmation obtained from all stakeholders to implement the project (sustainable solution) for all ongoing and future (200 No. s of substation). Challenges like technical vulnerability, original manufacturer confirmation on newly proposed method were overcome. Team initially plan to implement the project for 10 numbers of selected on-going substation, which was successfully tested and completed. Accordingly, as per the project master plan, team implemented the suggestion and executed in running projects after getting concurrence from concerned stakeholders.

The innovation in testing method of high voltage test resulted in optimized usage of SF6 gas work( avoids SF6 gas emission to ozone) which foucs on sustainability pillar environmental. The innovative method is a breakthrough and first kind of new methodology of testing globally, which is contributing to sustainability. Overall industry level, due to of consumption of SF6 gas reduced, the production of SF6 gas will be reduced in the industry and its remarkable breakthrough in contribution to sustainable goals on climate action and responsible consumption and production

The idea and initiative transferability to other region, country since the acheivement is breakthrough and first innovative idea among globally

Nil

This idea / initiative shared with other utilities through benchmarking visit. Other utilities also implement this idea as this method is technically recommended and proven worldwide by all stakeholders including original equipment manufacturer.

Transferred

Human resources- 5 resources ( Senior, mid management staffs) cost of the project- 0.3 Million AED

1. Cost saving of USD 3.26 million per 10 numbers of Substation. 2. Happy stakeholders (Resources, cost, time saved (328 man-days saved).

Да

Internal- DEWA corporate team External- IDEAS AMERICA team UAE idea by Dubai Quality Group ASIAN Power award

sustainable prespective Fish bone diagram

Sustainable initiative challenge faced cost saving

Nil

DEWA has engaged all its strategy partnership especially OEM. Detailed technical study conducted against each original equipment manufacturer including factory visit.Meeting were condcuted with all stakeholders in applying the high voltage through switchgear bus bars instead of applying only to cable chamber. Feedback and confirmation obtained from all stakeholders to implement the project (sustainable solution) for all ongoing and future (200 No. s of substation). Challenges like technical vulnerability, original manufacturer confirmation on newly proposed method were overcome. Team initially plan to implement the project for 10 numbers of selected on-going substation, which was successfully tested and completed. Accordingly, as per the project master plan, team implemented the suggestion and executed in running projects after getting concurrence from concerned stakeholders.

Dependency on limited test adaptor with manufacturer (OEM) which affected the implementation of the new proposed solution. Contractual issue- To make obligatory for the contractors during tendering stage. Develop and fabricate a test adaptor device in order to suit the requirement and manage contractual issue like warranty.