The importance of monitoring electrical equipment to ensure its stable and safe operation cannot be overstated. It plays a crucial role in maintaining the reliability and security of power systems. With the continuous advancement and maturation of online monitoring technologies, their successful application in China’s power system over recent years has led to a shift from traditional periodic maintenance to condition-based maintenance. This modern approach is now widely accepted and recognized within the industry, marking it as an inevitable trend in equipment maintenance.
For many years, China's power system relied on scheduled maintenance, where equipment was tested and maintained at fixed intervals. However, this method had limitations, such as unnecessary overhauls. As the nature of equipment defects has evolved, online monitoring for partial discharges, chromatographic analysis, and SF6 gas quality has gained increasing attention. Starting from 2010, the State Grid Corporation of China emphasized the need to fully implement condition-based maintenance, enhance equipment intelligence, promote smart technologies, and achieve real-time safety warnings and intelligent monitoring.
Online monitoring technology refers to systems and methods that can be directly installed on power equipment to record its operational status in real time. These systems typically integrate advanced sensor technology, computer processing, communication networks, expert analysis tools, and comprehensive data libraries. For example, in substation equipment, online monitoring includes capacitance and dielectric loss measurements for capacitive devices, full-current and resistive current monitoring for metal oxide arresters, insulation oil condition monitoring, fiber-optic temperature measurement, UHF partial discharge detection, dielectric loss tracking, on-load tap changer performance monitoring, GIS UHF monitoring, micro-water analysis, mechanical characteristic testing of switches, and SF6 gas density monitoring.
The investment value in the field of online monitoring for power equipment is becoming increasingly evident. The growing demand for these products is expected to remain strong. First, state-owned grid companies have adopted condition-based maintenance strategies as part of their smart grid development plans, leading to stricter requirements for grid reliability. Online monitoring solutions have become essential components. Second, beyond new substation construction, there is also significant potential in upgrading existing infrastructure. Third, there is a clear trend toward moving from single-product monitoring to integrated substation monitoring systems. Additionally, with the expansion of power equipment and a shortage of skilled workers, the grid increasingly depends on online monitoring to improve efficiency and management.
From the perspective of State Grid Corporation's procurement activities, the current market for online monitoring products is primarily focused on smart substations. In the smart grid planning report, the State Grid has identified the condition monitoring system of substations as a key component of smart substations. Intelligent substations can monitor critical equipment and parameters—such as transformer oil chromatography, partial discharges in combined electrical appliances, and the full current of lightning arresters—through state monitoring units. This provides essential data support for equipment management. Real-time status information, after analysis by an expert system, enables initial decision-making and supports the self-diagnosis capabilities of intelligent devices within the substation.
4M Endless Pool,Underground Swim Spa,Outdoor Endless Pool,Constant Heating Swimming Pool
SpaRelax Co., Ltd. , https://www.sparelaxoutdoorspa.com