Singapore Upper Jurong I Substation 230kV GIS Project

Upper Jurong I Substation is located in the Jurong industrial area, Singapore's core power load zone, serving as a critical transmission hub for western Singapore's industrial and urban power demand. For this project, Sieyuan supplied 20 bays of 230kV GIS to Singapore Power Grid.

The project owner enforces extremely high technical standards, rigorous execution norms, stringent quality control, and strict delivery schedule management. Client supervisors were on-site full-time at the factory for inspection, with a mandatory requirement for simultaneous UHF partial discharge (PD) monitoring during factory acceptance tests (FAT). Long-cycle procurement items such as DILO self-sealing valves carried lead times of 24–30 weeks, requiring immediate action upon contract award. Phased delivery across four batches had to be precisely coordinated with the site installation sequence, adding further schedule complexity.

Requirement Management

• In-depth interpretation and clause-by-clause execution — Technical teams jointly reviewed project specifications, issued a project requirements document, verified each clause, and formulated dedicated solutions.

• Engineering baseline replication with localized adaptation — Leveraged experience from a previous 66kV GIS project in Singapore, established a Singapore engineering baseline, and applied it to execute the 230kV GIS project.

• Face-to-face clarification and rapid closure — During the design phase, Sieyuan engineers traveled to Singapore for direct client communication, promptly clarifying and confirming 3D models, mechanical interlocks, test requirements, and other technical issues.

Schedule Management

• Milestone-driven backward planning + phased delivery — Developed a 4-batch shipping plan aligned with the site installation sequence, with backward planning applied across design, production, and testing milestones.

• Tight coordination between engineering and manufacturing — Locked R&D deliverables against production assembly milestones to keep manufacturing progress on track.

Quality Management

• Full-time on-site inspection — Client supervisors remained on-site throughout production, testing, and packaging phases for full-process inspection.

• Enhanced production controls — Added contact resistance measurement, dedicated inspection for critical items, and main busbar cleaning checks to elevate process quality.

• Specialized test control — Developed a project-specific audit checklist with on-site process and quality reviews prior to testing; each unit underwent real-time UHF PD monitoring to proactively identify insulation defects.

• Upgraded packaging for shock resistance and fire safety — Optimized the layout and quantity of shock indicators; metal packaging was introduced for spare parts for enhanced fire protection compliance.

Procurement Management

• Early locking of long-lead items — Long-cycle components such as DILO self-sealing valves (24–30 weeks lead time) were sourced immediately upon contract award.

• Direct international sourcing to reduce lead time — DILO equipment was air-freighted directly from Germany to Singapore, eliminating intermediate supply chain links.

• Compliant hybrid supply for PD monitoring — Mature brand sensors combined with a QL brand back-end system; 5pC sensitivity verification was completed under client witness, successfully passing client witness testing on the first submission.

FAT Management

• Proactive supervision team setup + early ITP alignment — Held a pre-supervision kickoff meeting, formed the FAT team, and aligned test items, tooling, and workflow with the client in advance.

• Pre-calibration and pre-check of PD sensitivity — Conducted on-site UHF PD sensitivity calibration and 5pC pre-testing; formal FAT achieved first-pass approval by the client's PD experts.

Logistics Planning

• 4-batch delivery aligned with installation sequence — Precisely matched the site installation rhythm, minimizing on-site storage requirements and shortening overall construction duration.

• Upfront loading plan optimization — Finalized the loading scheme prior to first shipment, confirming equipment zoning, securing, and protection measures for safe transportation.

• Traceable transport condition monitoring — Equipped with shock indicators and inspection checklists to monitor impact and vibration throughout transit, enabling full traceability and accountability for any anomalies.