OM.R920 GIS Partial Discharge On-Line Monitoring System

Product Overview
The OM.R920 GIS Partial Discharge Online Monitoring System is specifically designed for monitoring the insulation condition of GIS equipment. It utilizes advanced internal/external UHF sensor technology to continuously track partial discharge signals within the GIS in real time. The system then analyzes and processes these signals in the background, enabling an accurate assessment of the GIS insulation status, identification of defect types, and pinpointing the approximate location of any issues. Finally, it provides actionable maintenance recommendations to prevent insulation failures, minimize downtime, and reduce both maintenance costs and operational disruptions.

System Architecture
● Perception Layer: Employs built-in or external partial discharge sensors connected to the on-site partial discharge acquisition unit via coaxial cables or LORA wireless transmission.
● Convergence Node Layer: Employs RF radio frequency processing and a high-speed acquisition board for partial discharge signal collection, communicating with the PD diagnosis server via fiber optic cable.
● Comprehensive Diagnosis Layer: Employs large-capacity real-time database technology to store partial discharge data, and leverages an intelligent neural network algorithm—based on a partial discharge fault fingerprint database—to accurately identify fault types. It also enables early warning of partial discharge faults through event trend analysis and statistical methods.

Software interface

Advantageous Features
● Two-dimensional waveform and three-dimensional phase mapping technology provide an intuitive display of the discharge state.
● Automatic recording and playback of partial discharge data
● Automated Identification of Partial Discharge Fault Patterns and Severity Assessment
● Analysis and Assessment of Local Discharge Historical Development Trends
● System self-check and self-recovery function for failures
● High-reliability, high-sensitivity UHF sensor with an average equivalent height of ≥16mm—surpassing other similar products.
● The ultra-wide dynamic-range partial discharge acquisition unit (-75 to -5 dBm), boasting a dynamic range of up to 70 dB, enables it to detect even faint local discharge signals within GIS systems—while simultaneously reducing the number of UHF sensors required, thereby enhancing cost-effectiveness.
● Powerful interference signal suppression is achieved by employing a "noise statistical analysis" method, combined with software and hardware filtering, shielding, and other techniques, effectively mitigating common corona discharge interference and frequency-band disturbances from mobile communications within substations.

System Parameters

On-site Cases

State Grid Ningxia Lingzhou ±800kV Converter Station		India's National Grid Corporation 765kV Thiruvalam Substation