1. Difficulty in maintenance: Currently, the substation in operation generally adopts an independent and decentralized setup for the aforementioned types of control power equipment, which are provided by different suppliers and managed by various departments. Relay protection is responsible for the maintenance of DC operation power sources, automation for AC control power sources, and remote communication for communication power sources. This not only leads to redundant functional configurations and increased initial equipment investment but also results in high maintenance costs due to different maintenance interfaces across specialties. Additionally, the AC and DC control power products provided by different suppliers lack unified interface specifications and monitoring equipment, making it impossible to share system data and complicating comprehensive system analysis, maintenance, and integrated information management for the entire AC and DC control power equipment. Since the manufacturers of different power systems vary, when a power failure occurs or when maintenance is required for the power system, service personnel from multiple suppliers need to be dispatched to the site. Their arrival can take anywhere from a few hours to several days, thus extending work duration, affecting equipment power supply, and presenting similar issues for inspection personnel. 36V aviation power supply, 400HZ frequency conversion power supply, 115/200V power supply, 27V DC power supply, 400HZ power supply, aviation power supply
2. Poor cost-effectiveness; if traditional power systems are adopted, it would result in separate battery configurations for DC power, UPS uninterruptible power supply, and communication power, supplied by different manufacturers. AC power is typically from another supplier, and the AC system includes power automatic switching equipment, with redundant charging modules, leading to waste and difficulty in coordinating equipment operations. Additionally, considering the increased number of spare parts and manufacturers, the waste is significant.
3. Despite all equipment in the substation being required to use the IEC61850 protocol to resolve compatibility issues with communication protocols, the lack of a unified monitoring system to manage the entire station's power supply means system data sharing cannot be achieved. Consequently, advanced applications such as coordinated operation, condition-based maintenance, and deeper system development cannot be implemented.
