In case of no acceptance, you can also ask for your personal data to be removed from our database sending the request to firstname.lastname@example.org.
Designing a Sustainable Secondary Substation
Published on Monday, December 13 2021
Login or Sign up
Challenge Expiration Date: February 14, 2022
Enel Global Infrastructure & Networks is looking for a new design concept for a prefabricated secondary substation, which must have innovative features in design, materials, and construction, incorporating the principles of sustainability and, in particular, a circular by design approach. The new design must ensure, both in the technical characteristics and in those of the product, the complete observance of the technical and safety regulations currently enforced for its use and installation, as well as consider the minimum dimensions to house all the equipment normally found inside.
Secondary substations constitute electrical infrastructures dedicated to the protection of medium voltage (MV) and low voltage (LV) electricity grid components and accessed by Enel's expert staff. The described Challenge aims to identify an innovative architectural design of a street level secondary substation that utilizes sustainable materials and improves the integration of the structure in rural and urban contexts, while retaining existing functionality.
Enel is fully committed to the energy transition with a particular focus on decarbonization of its business model. Enel considers environmental sustainability as a priority to be embedded in all the Group's businesses and considers, among other things, the circular economy as a strategic driver to pursue this transition and achieve its commitment. Enel's vision of circular economy is not limited to materials recycling, but extends to business activities along the entire value chain involving its ecosystem, starting from the design and procurement phases up to those of production and end-of-life management: to be truly effective this approach, must be applied from the design stage and must guide the design of the new prefabricated secondary substations.
This Challenge provides contribution to the following Sustainable Development Goals (SDGs):
- SDG 8: Promote sustained, inclusive and sustainable economic growth, full and productive employment and decent work for all
- SDG 9: Build resilient infrastructure, promote inclusive and sustainable industrialization and foster innovation
- SDG 11: Make cities and human settlements inclusive, safe, resilient and sustainable
- SDG 12: Ensure sustainable consumption and production patterns
- Register now to start solving this Challenge! The full description Challenge will be available to logged in users only. -
For questions about the Challenge and your proposal you can contact: EnelOpenInnovabilityChallenges@wazoku.com
!! DEADLINE EXTENDED !!
The use of prefabricated secondary substations follows daily and ordinary activities that require internal interventions and inspections to be performed only by competent Enel personnel, intended to check the structure, and verify its integrity in the event of accidental impacts or any tampering. For the safety of Enel specialist personnel and third parties such as pedestrians, the secondary substation complies with specific safety conditions described below.
Find attached a few examples of prefabricated secondary substations. The existing structures are constructed with reinforced concrete.
The proposed solution for prefabricated substations must be installed in heights not greater than 1.000 m and shall be assembled in a single module (monobloc) for a medium voltage system. The respective dimensions of the internal components that must be installed and maneuvered are highlighted, but determining the layout of these components is not within the scope of this Challenge.
Prefabricated substations must comply with the following minimum requirements:
- Protection degree: must be guaranteed an IP 33 protection degree towards the outside according to IEC 60529 and IK 10 according to IEC 62262 (including doors and the grilles of the ventilation system).
- All the components indicated on the Table 1, will be installed within the solution. It must take into consideration the maneuvering area to allow for safe operations.
- Enclosure for the transformer, with supports to carry its weight; with dielectric liquid collection tank (minimum volume 650 liters) and firewall system. Such enclosure shall allow the useful passage of the opening provided for the transformer inlet.
- Nameplate and lifting diagram: externally and internally in the wall with door, a non-removable plaque with the name, logo and any additional information shall be included.
- Personal access door and transformer access door: shall be installed in such a way that they have no electrical contact with the equipotential system. The doors shall have a lock with three anchorage points, one at the top, one at the bottom and one at mid-height.
- Ventilation system: two or more airing windows installed without any electrical contact with the equipotential system. The system shall comply with:
- Each airing window must be equipped with a mesh screen with a maximum span of 6 mm.
- Ventilation openings shall comply with the requirements of point 5.104.5 of the IEC 62271-202:2015 Standard.
- Ventilation shall be provided in the housing intended for the transformer. The dimensioning of the windows, as well as the type of louvers to be provided, shall be indicated on the corresponding drawings. The cross-section of the ventilation grilles shall be calculated in such a way as to allow proper ventilation of the transformer and other equipment.
- Two wind mechanical turbines that can be installed on the roof must be considered. An example of the type currently used can be seen in document DG2061 Ed.9.
- Auxiliary services & lighting system: an electrical system must be provided for the connection of all the equipment necessary for the operation of the prefabricated box (auxiliary services panel, lamps, etc.); those connections shall be made with single-core cable with flame-retardant type insulation. This system must include nr. 3 LED lamp luminous flux 1.000/3.000 lm and Protection class IP54. One of those lamp should be able to work in emergency conditions for at least 3 hours. The location of the lighting fixtures should be adequate to illuminate the enclosures perfectly for a correct vision; the replacement of the lamps maintaining safety margins with others equipment.The lighting switch, which shall have a light signal when the substation is dark, shall be installed immediately at the entrance of the primary substation. To comply with Spain Law (RAT 14), the lighting circuit must withstand the applied voltage test of 10 kV (rms value) for 1 minute and the lightning impulse test, with a peak value of 20 kV, between its active parts and the center masses.
- Equipotentiality: Prefabricated substation shall be constructed in such a way that, once installed, its interior is an equipotential surface.
- Common conditions:
- No metallic element attached to the equipotential system can be accessible from outside the prefabricated substation.
- All metallic materials, which are exposed to air, shall be corrosion resistant by their very nature or shall be provided with the appropriate protective treatment.
- Between the general grounding system and the exterior of the substation (enclosure, cover, doors and grids), there shall be an electrical resistance equal to or greater than 10.000 Ω.
- The materials constituting the prefabricated substation shall be heat and fire resistant, as indicated in point 5.104.2 of Standard IEC 62271-202:2015.
- Grounding system: shall have two points - easily accessible and protected against shocks - for grounding in its interior enclosure.
- Electrical hazard signaling shall include the corresponding electrical hazard signage on all sides of the enclosure that have an opening with a door and/or airing windows. This signage shall consist of the installation of the triangular electrical hazard sign defined in: UNI 7544-11; UNI 7543-1; UNI EN ISO 7010; ISO 3864-1/3864-3/3864-4 (see Figure 1). The sign shall be made of anodized aluminum with a minimum thickness of 0.5 mm and its base between 250 mm and 350 mm in length.
Accessibility: the prefabricated substation shall have the necessary openings for access to the transformer enclosure and to the enclosure for MV and LV components. The openings shall have the following minimum dimensions: Width x Height = 1.250 x 2.100 mm.
These openings shall be closed with doors having the following characteristics:
- maintain the IP and IK degrees of protection already defined;
- hinged on the external face;
- capable of opening 180° with an interlock at 120° to prevent accidental closure;
- shall comply with the point 5.104.4 of Standard IEC 62271-202:2015.
The dimensions of the prefabricated box shall be designed to allow the installation of the elements specified below, and they shall be arranged in such a way that their handling and maintenance is achieved with the most possible comfort and ease for the operator, and all the required regulatory, legal and safety measures shall be preserved, paying special attention to respect the aisles and protection areas provided.
The design of the prefabricated box must consider the maximum dimensions of the standard components that will be installed inside it.
Below the DIMENSIONS FOR COMPONENTS PRESENT ON THE PREFABRICATED SUBSTATION SOLUTION (Component: Dimensions [mm] (Height – Depth – Width))
- MV Switchgear : 1800 – 800 – 1960
- LV Switchboard*: 2000 – 600 – 750
- Transformer: 2080 – 1990 – 1190
- TLC - Peripheral unit (UP)**: 735 – 425 – 532
- Auxiliary services panel (S)**: 450 - 180 – 260
- Base for Remote control concentrator (R)**: 740 – 150 – 260
- Base for LV sensorization (C)**: 740 – 150 – 260
* LV switchboard can also be placed by means of support with adjustable height, in any case overall dimensions must be guaranteed. Detailed example: DG2061 ed.9.
**Rack cabinet 19" with 40U (height x Depth x Width: 2050 x 600 x 600 mm) must be considered to contain the indicated components as alternative solution. Detailed example: DY3005 ed.4.
Listed dimensions are intended as minimum values:
- Maneuvering area (distance ≥ 1.000 mm).
- M: distance margin for as-built error dimensions.
- a: Internal width ≥5.550 mm.
- b: Internal depth ≥ 2.300 mm.
- Internal useful height ≥ 2.300 mm.
About the material to consider:
The existing prefabricated substation is made of reinforced concrete. The material of the new one shall meet the requirements of circular by design additional requirements (see Solution Requirements below).
The material to be used in the manufacture will have to withstand a compressive stress resistance equal to or greater than 250 kg/m². External materials shall be resistant to temperature variations and ultraviolet rays.
- Shall be able to withstand overloads of 480 kg/m² when its installation is planned for an elevation below or equal to 1.000 m.
- Must be properly fixed to the structure and ensure an average heat transfer coefficient of less than 3.1 W/°C m².
- The roof must also be protected by a proper waterproofing layer.
- It must proper hanging points for transportation and installation.
- Shall be capable of withstanding the vertical forces of their own weight, plus that of the roof and roof overloads, simultaneously with a horizontal stress of 100 kg/m².
- At least two through-wall in plastic material must be fixed, with a minimum internal diameter of 150 mm, embedded in the wall during the construction phase, to allow the passage of temporary electrical cables.
- Shall be able to withstand vertical overloads of 400 kg/m², except in the transformer movement and location area, where the resistance shall be adequate to the loads transmitted by the transformer. The weight to consider is 4.000 kg.
- For MV Switchgear a proper shaft opening adequately sized to ensure:
- Adequate support of the MV switchgear on a firm floor
- That the rear of the MV switchgear should maintain a minimum distance to the rear wall of 20 mm.
- That the length of the opening is greater than the maximum expected total width of the MV switchgear to allow a certain tolerance in it installation (for example 650 mm x 2.800 mm).
Must be provided.
- For the LV switchboard:
- Adequate support of the LV switchboard on a firm floor:
- Aperture of suitable dimensions for LV switchboards (considering the dimensions on Table 1) for the access to the foundation basin of LV cables.
- The base panel shall have a minimum thickness of 5 mm and enough mechanical rigidity to allow anchoring of the LV switchboard.
- The fixing system between the base panel and LV switchboard shall be suitable so that the assembly can withstand the test of voltage applied at industrial frequency of 10 kV (rms value) for 1 minute and lightning impulse type 1,2/50 μs at 20kV peak.
- The sides of the LV switchboard maintain a minimum distance to the adjacent wall of 20 mm.
- Adequate support of the LV switchboard on a firm floor:
Must be provided.
Note: In case of LV Switchboard with adjustable support, the substation must be able to fix it to the structure.
Note: for both MV switchgear and LV switchboard, the opening for fixing the panels shall include a cover(s) covering 50% of the length of the opening. These covers shall withstand the same vertical overload. In addition, the covers shall be made in more than one piece so that they can be removed individually and none of them individually weighs more than 20 kg.
- For the transformer:
- Minimum aperture of dimensions 300 mm x 150 mm for MV/LV transformer for the access to the foundation tank of MV cables.
Must be provided
- For the Rack cabinet 19" with 40U:
- Aperture of dimensions 500 mm x 500 mm (with provision for rack fixing), for the rack (example: DG2061 Ed.9) with access to the foundation basin of LV cables.
Must be provided
Prefabricated, made in a single block, with a minimum depth of 500 mm and covering the whole area of the room. A mechanical connection must be provided between the box and the basement, with a coupling system that prevents the box from moving horizontally.
The lower part of the enclosure shall be equipped with holes for the passage of medium voltage cables, low voltage cables, as well as for the earth and protection circuit cables.
All the openings shall be provided with a plug that will ensure the same IP and IK protection ratings as those previously required.
The basement must be equipped with:
- 10 holes with a diameter of 200 mm for the passage of MV cables;
- 8 holes with a diameter of 200 mm for the passage of LV cables;
- 4 holes with a diameter of 200 mm for the passage of cables of other services.
These holes will be positioned at a distance from the bottom of the tank such as to allow the containment of any oil leaking from the transformer, fixed in a minimum volume corresponding to 650 liters.
- Any joints between the structures and the entire perimeter of the box at the point of support with the base must be sealed for a perfect watertight fit.
- The external walls must be treated with wall coating additives that guarantee perfect anchorage on the structure, resistance to atmospheric agents even in industrial and marine environments, inalterability of the color to sunlight and stability to temperature changes (-20°C + 60°C).
Additional project request
The design loads to be considered in the calculation of the structures constituting the cabin are:
- Seismic action: structural checks will be carried out according to the requirements of the current Standards for Construction (relating to materials proposed for the challenge), in seismic zone, in the most conservative conditions for the country in which the prefabricated substation will be installed. (As example, the requirements for Italy are showed on the point 4.3.1-part C of the standard: DG2061 Ed. 9).
- Stresses due to lifting and transport of the box complete with equipment (excluding the transformer), for mobile and permanent loads on the floor of the substation.
A prototype will be subjected to the following tests, according to IEC standards except for specific description:
- Visual examination: Verification of the previously described components and systems; correct arrangement for the cable passages necessary for the connections of the elements inside the cabin.
- Dimensional check: Verification of the availability of space necessary to allow the components inside the substation enabling safe maneuvering and working spaces; verification of proper accessibility to install each component.
- Functional tests: As indicated in IEC 62271-202, section 6.10.2 (where applicable).
- Ventilation check: The verification of adequate ventilation shall be performed by means of the heating test indicated in point 6.5 of IEC 62271-202 for enclosure class 10K. Consider the maximum power of the transformers (1.000kVA) for the test.
- Verification of the characteristics of the material used based on tests carried out at an accredited laboratory
- Electric test
- Equipotentiality: Electrical continuity shall be verified by suitable means between any of the metallic points connected to the internal reinforcement of the floor, walls, and roof.
- Resistance test: Both electrodes shall be applied to the internal reinforcement and to the external elements. The test shall be considered to have been passed if the value of the electrical resistance in all cases considered is equal to or greater than 10.000 Ω.
- Dielectric tests: Prototype shall be subjected to the industrial frequency withstand voltage and impulse withstand voltage tests as specified in IEC 61439-1 respectively, except where different parameters were specified in the preceding paragraphs.
- Verification of the prefabricated substation behavior during the lifting phase: The complete substation with all equipment, with the only exception of the transformer.
- Tests to verify mechanical resistance: For the verification of the mechanical effects on the enclosure, walls, and roof, proceed as indicated in IEC 62271-202, section 6.101. In addition:
A uniformly distributed vertical load of 800 kg/m² shall be applied on the floor, except in the areas of movement and location of the transformers, where the resistance shall be adapted to the load of a 1.000 kVA transformer. The test shall be considered to have been passed if the material used has not damage in any of the compressed areas and in the reinforcement bars the breaking stress has not been reached.
- Degree of protection check: The test shall be carried out in accordance with IEC 60529. The IP33 degree of protection shall be verified.
- Check for possible loss of oil containment: After filling with water, the basement, or the transformer tank if it has been expressly designed for this purpose, the test will be considered successful if no water leaks out after 12 hours from the filling.
- Waterproofing of the roof
- Resistance to temperature variations and ultraviolet rays
- Verification of paint surface treatments
Enel Global Infrastructure & Networks is looking for a new design concept for a prefabricated secondary substation, which must possess innovative features in design, materials, and construction, incorporating the principles of sustainability. In this sense, the new design should enhance natural integration in the human context (aesthetic and harmonic criteria) ensuring safety also for third parties, and it should deploy a circular by design approach.
The development of the new prefabricated secondary substation will have to meet the following needs:
- Comply with the technical and safety requirements currently contemplated by Enel for a prefabricated secondary substation, to prevent safety risk for both workers and third parties
- Have suitable dimensions for the installation of all components
- Respond to a better integration within the city or rural context where it is installed (possibly with the possibility of foreseeing more variations of its version based on the location), ensuring aesthetic and visual landscape integration
- Incorporate into its design the main principles of circular economy and sustainability and enhance the corporate image of Enel and its vision through design. The solution must provide for the possibility of conveying messages aimed at customers or the various stakeholders of the Company.
Submissions must address the following Solution Requirements.
- Height ≥ 2.300 mm; Width ≥ 5.500 mm; Depth ≥ 2.300 mm
- Provide IP 33 protection degree towards the outside according to IEC 60529 and IK 10 according to IEC 62262 (including doors and the grilles of the ventilation system).
- Accessible openings shall have the following minimum dimensions: Width x Height = 1.250 x 2.100 mm.
- The material to be used in the manufacture will have to withstand a compressive stress resistance equal to or greater than 250 kg/m².
- External materials shall be resistant to temperature variations and ultraviolet rays.
- Structure coverage shall be able to withstand overloads of 480 kg/m² when its installation is planned for an elevation below or equal to 1.000 m.
- Walls shall be capable of withstanding the vertical forces of their own weight, plus that of the roof and roof overloads, simultaneously with a horizontal stress of 100 kg/m².
- Floor shall be able to withstand vertical overloads of 400 kg/m², except in the transformer movement and location area, where the resistance shall be adequate to the loads transmitted by the transformer. The weight to consider is 4.000 kg.
- Basement is prefabricated, made in a single block, with a minimum depth of 500 mm and covering the whole area of the room. The lower part of the enclosure shall be equipped with holes for the passage of medium voltage cables, low voltage cables, as well as for the earth and protection circuit cables.
- Any joints between the structures and the entire perimeter of the box at the point of support with the base must be sealed for a perfect watertight fit.
- Adhere to all safety and technical requirements as pertains to Enel.
- Promote a positive visual impact of these infrastructures that improves their insertion in the territorial realities, favoring their reception in a closer dialogue with the nature of the places where they are located.
- To be the expression of a project research (design) able to provide the prefabricated substations with new quality and innovation.
- To be the symbol of a new vision of energy that the Company promotes and communicates: more participatory, bidirectional, sustainable, and enhances a closer relationship between the Company and customers. Provide for the possibility of conveying messages addressed to customers or to the various stakeholders of the Company.
- Is economically feasible and viable.
- Integrate the circular perspective into the design with the aim of ensuring asset longevity, encouraging modularity and therefore component replacement and maintenance, as well as recycling/reuse of cabin materials at end of life. Key drivers of a circular by design approach include:
- Product Structure/Architecture: reduce the number of components relative to the main functionality required and adopt a design that facilitates the removal of hazardous materials.
- Components: use durable components and avoid hazardous materials
- Materials: select as much as possible recyclable/recycled and energy-efficient materials and minimize the variability of materials used. When analyzing materials, the assessment should be made considering IEC62474, REACH (European Union regulation for Registration, Evaluation, Authorization and Restriction of Chemicals) and RoHS (Restriction of Hazardous Substances, Directive 2002/95/EC). The incorporation in the design of recycled materials would be preferable. In particular, the use of most sustainable alternatives to traditional reinforced concrete would be the best option (including clinker replacement materials, recycled concrete, bioconcrete)
- Design for dismantling: the component must be designed to facilitate disassembly and recovery of all materials at the end of its life.
The submitted proposal should include the following:
- A detailed description of the proposed solution addressing specific Solution Requirements
- Well-substantiated rationale and pertinent data to support why architectural design is sustainable and highlighting any innovative features
- Schematics that illustrate important aspects of the design (e.g. electrical, mechanical, visual, functional)
- A bibliography of relevant literature (e.g. journal articles, patents, trade materials) that support the proposed solution
- An assessment of initial installation and continued maintenance costs
- Estimate of cost level for different volumes, prototyping timeline, and go-to-market strategy
The proposal should not include any personal identifying information (name, username, company, address, phone, email, personal website, resume, etc.) or any information the Solvers may consider as their Intellectual Property they do not want to share.
All proposers are invited to read carefully the Challenge and the Regulation of this Challenge, attached below in the Attachments section, before submitting a solution.
This Challenge is dedicated to designers, Engineer, Architect, design studios, startups, scaleups and SMEs, industries incorporated in any country.
The employees of Enel Global Infrastructures & Networks and of the other Companies of the Enel Group who are involved in the organization and management of the Competition or admitted to the Open Innovability Portal back office, as well as their spouses or partners and their relatives up to the fourth degree, are not eligible for participation in this Challenge.
Also, employees of the companies of the Enel Group who have worked in the technical sector of secondary substations and that work, in the moment of the Challenge, on substation design, or their spouses, partners or any of their relatives up to the fourth grade determined according to Italian law are not eligible for the participation in this Challenge.
Explain your proposal clearly in English, attach documents (max 5 files, 25MB total size) if needed.
Challenge, award, IP rights
This is a Reduction to Practice Challenge that requires written documentation including an architectural design of the solution.
The submission to the Challenge should include the following:
- An explanation of the proposed solution addressing specific Solution Requirements along with a well-supported rationale and pertinent data
- Schematics that illustrate important aspects of the design
- A cost assessment, prototyping timeline, and implementation strategy
Upon Acceptance of a Proposed Solution by the Seeker and payment of the Award, the exclusive IP rights of the winning Solution will be transferred to the Seeker.
The total prize pool budget is $30,000. Furthermore, partial awards may be considered for solutions that meet some, but not all, of the criteria.
!! DEADLINE EXTENDED !!
Submissions to this Challenge must be received by 11:59 PM (Central European Time) on February 14, 2022.
Late submissions will not be considered.
Specific regulation in the CSA attached at the bottom of this page.
What happens next?
After the Challenge deadline, the Seeker will complete the review process and make a decision with regards to the Winning Solution(s). All Solvers that submit a proposal will be notified on the status of their submissions. Enel will evaluate the proposal using the following criteria: In case the reward includes "Collaboration with Enel", once suitable solution/s have been identified, Enel will reserve the opportunity to start a collaboration, by way of example, all or part of the following activities: Upon completion of the evaluation, you will receive feedback. In case of success, an Enel contact person will get in touch with you to discuss the next steps. The final award for this Challenge is contingent upon satisfactory completion of the verification process, including acceptance of the Challenge-Specific Agreement (CSA) that is the regulation for this Challenge. The verification process includes obtaining the following from the Solver: signed affidavit (based on the CSA), employee waiver (if applicable), proof of identify, and Counterparty Analysis Questionnaire (CAQ). ABOUT INNOCENTIVE InnoCentive collaborates with Enel to manage this Challenge. InnoCentive is the global innovation marketplace where creative minds solve some of the world's most important problems for cash awards up to $1 million. Commercial, governmental and humanitarian organizations engage with InnoCentive to solve problems that can impact humankind in areas ranging from the environment to medical advancements.
After the Challenge deadline, the Seeker will complete the review process and make a decision with regards to the Winning Solution(s). All Solvers that submit a proposal will be notified on the status of their submissions.
Enel will evaluate the proposal using the following criteria:
In case the reward includes "Collaboration with Enel", once suitable solution/s have been identified, Enel will reserve the opportunity to start a collaboration, by way of example, all or part of the following activities:
Upon completion of the evaluation, you will receive feedback.
In case of success, an Enel contact person will get in touch with you to discuss the next steps.
The final award for this Challenge is contingent upon satisfactory completion of the verification process, including acceptance of the Challenge-Specific Agreement (CSA) that is the regulation for this Challenge.
The verification process includes obtaining the following from the Solver: signed affidavit (based on the CSA), employee waiver (if applicable), proof of identify, and Counterparty Analysis Questionnaire (CAQ).
InnoCentive collaborates with Enel to manage this Challenge.
InnoCentive is the global innovation marketplace where creative minds solve some of the world's most important problems for cash awards up to $1 million. Commercial, governmental and humanitarian organizations engage with InnoCentive to solve problems that can impact humankind in areas ranging from the environment to medical advancements.