66kV Aershan Substation Capacity Expansion & Extension Project Solution – Reliable Power Hub Upgrade in Extremely Cold Environments

The Aershan region is located in a high-cold zone, with severe, long winters posing significant challenges to the stable operation and construction of substation equipment. This capacity expansion and extension project aims to enhance regional power supply capacity and reliability. We provide a comprehensive solution integrating extreme cold environment adaptation, modular expansion, and intelligent operation and maintenance, ensuring the project becomes a safe, efficient, and intelligent modern substation.

1.Core Project Challenges & Solutions

Challenge ①: Extreme cold climate affects equipment operation and construction
✅Solution:

Extreme Cold Equipment Selection: 66kV main transformers use -45°C special transformer oil and low-temperature toughness steel. Switchgear (selects) armored withdrawable switchgear (KYN61), equipped with low-temperature anti-condensation heating devices.

Indoor/Semi-Indoor Design: Key secondary equipment is installed in well-insulated indoor distribution rooms, effectively resisting wind, snow, and extreme cold.

Winter Construction Special Plan: Uses low-temperature grouting material, sets up insulation sheds, preheats installation components, and other measures to ensure civil works and installation quality.

Challenge ②: Expansion project must ensure uninterrupted power supply to the existing grid
✅Solution:

Systematic Transition Plan: Designs detailed load transfer and power outage plans, utilizes temporary power supply circuits to minimize outage time.

Modular Prefabricated Cabin Application: Integrates secondary protection, communication, DC systems, etc., into prefabricated intelligent cabins, achieving "plug-and-play," reducing on-site commissioning time and impact on operating equipment.

Phase Verification & Phasing: Uses advanced phasing instruments to ensure absolute phase accuracy when connecting new and old equipment, eliminating short-circuit risks.

Challenge ③: Enhance intelligence level to achieve reduced/ unattended operation
✅Solution:

Integrated Monitoring System: Adds a Computer Monitoring System (SCADA) to achieve "Three Tele" functions (Teleindication, Telemetry, Telecontrol) for main transformers, 66kV/10kV lines, DC systems, etc.

Intelligent Auxiliary System: Integrates video security, fire alarm, environmental temperature/humidity, access control, etc., achieving comprehensive intelligent linkage within the station.

Online Monitoring: Configures online dissolved gas analysis (DGA) for main transformers, circuit breaker condition online monitoring, etc., shifting from "periodic maintenance" to "condition-based maintenance".

2. Core Equipment Configuration Plan

3. Technical Highlights

Deep Adaptation to Extreme Cold: Addresses issues like low-temperature startup, material embrittlement, insulation performance degradation from the component level, guaranteeing equipment lifecycle under extreme climate.

Safe and Efficient Expansion Strategy: Achieves smooth capacity expansion with "zero accidents, low impact" through precise electrical calculations and construction organization design, demonstrating rich project experience.

Full Station Intelligent Upgrade: Builds an integrated monitoring platform, laying the foundation for future connection to the regional smart grid and distributed energy integration, improving O&M efficiency by over 50%.

Modularization & Prefabrication: Significantly shortens on-site construction cycle, reduces weather impact, improves project quality consistency.

4. Our Core Advantages

Rich Experience in Environmental Adaptation: Possesses numerous successful cases in special environments like high-altitude, extreme cold, and coastal areas.

One-Stop Solution: Provides full-process services from preliminary consultation, solution design, equipment supply, installation guidance to commissioning and operation.

Strong Technical Support: In-house R&D team capable of customized equipment design and development based on project requirements.