GIS Partial Discharge Online Monitoring System

MOEORW-W5086U-220 GIS Partial Discharge Online Monitoring System is independently developed by Wuhan Moen Intelligent Electric. It is specially designed for online insulation monitoring of high-voltage primary equipment such as 220kV and above GIS, HGIS, tank circuit breakers and main transformers. Adopting an integrated multi-channel acquisition architecture of UHF ultra-high frequency, it is compatible with external flat UHF sensors and supports synchronous signal acquisition of up to 30 channels, covering the full-scene online partial discharge monitoring demands of substations.

It is suitable for bulk procurement of new power grid construction, reconstruction and intelligent upgrading of stock substations. It can be supplied as a complete set of single cabinets and uniformly configured in batches for multiple stations, fully complying with the national grid and China Southern Power Grid standards for power monitoring. It is the mainstream selection for bulk procurement of power engineering general contractors, equipment integrators and power maintenance units.

1. UHF Ultra-high Frequency Detection Technology with Leading Industry Accuracy

• Technical basis: Sensor bandwidth ranges from 300MHz to 1500MHz, detection dynamic range 60dB, detection sensitivity ±1dB.
• Advantage explanation: It avoids low-frequency interference from power frequency, broadcast and radar signals, with 80% stronger anti-interference performance compared with ultrasonic and gas analysis methods. The minimum detectable discharge capacity meets the on-site testing requirements of DL/T 417. Adopting front-end RF filtering and logarithmic detection circuits, signal attenuation is controlled to an extremely low level, ensuring stable measurement even with long-distance coaxial wiring.
• Credibility support: All equipment strictly complies with partial discharge testing standards including GB/T 7354, DL/T 417 and IEC 62478. Every unit undergoes high-low temperature, EMC and vibration aging tests before delivery, with complete test reports provided.
   

2. Modular Plug-and-play Design with Up to 30 Channels for Flexible Bulk Project Configuration

• Advantage explanation: The acquisition unit adopts a modular slot structure, allowing channels to be added or removed according to the number of GIS bays in substations. One main unit adapts to multi-bay monitoring. Wholesale clients can match channel quantities on demand for projects instead of purchasing complete whole units, cutting idle project costs. Faulty channels can be isolated independently; only single channel modules need replacement on site without returning the whole unit to factory, reducing operation labor costs by 60%.
• Credibility support: Each channel features independent timing control and data calculation, with no phase offset during multi-channel synchronous power frequency sampling and synchronization error less than 1μs, meeting the power grid specification for multi-bay synchronous monitoring.
   

3. Three-layer Standardized System Architecture Compatible with Existing Power Grid IoT Platforms

• Layer division: Sensor Layer (Process Layer) → Acquisition Unit (Bay Layer) → Station Server (Station Control Layer), fully compatible with IEC61850 power system architecture.
• Communication advantages: Local data collection via customized protocols, and data uploading to platforms via standard Modbus TCP protocol, seamlessly connecting edge IoT agents and provincial/municipal power master stations. No renovation of existing background systems is required for bulk reconstruction projects, compatible with original monitoring platforms and greatly shortening construction and commissioning cycles.
• Credibility support: The system communication protocol has passed compatibility tests for equipment access of State Grid and China Southern Power Grid, and has been applied in bulk projects of over 100 220kV substations with zero compatibility failure cases on site.

4. Wide-temperature Industrial Hardware Applicable for Indoor & Outdoor Use, Reducing Differentiated Inventory for Bulk Projects

• Environmental parameter basis: Operating temperature -40℃~+70℃, altitude tolerance ≤5000m, Grade 8 seismic resistance, Class III pollution protection, resistant to ice coating, heavy rainfall and strong wind outdoor conditions.
• Advantage explanation: The same main acquisition unit fits both indoor control cabinets and outdoor stainless steel monitoring boxes. Wholesale clients undertaking projects in mountain, coastal and plain areas do not need to stock separate indoor/outdoor models, reducing inventory SKUs and capital occupation. Local solid-state drive storage saves characteristic data for more than 1 year and 24-hour real-time original waveforms without data loss under network disconnection.
• Credibility support: The complete unit passes high-low temperature cycling, vibration, shock and salt spray tests in accordance with GB/T2423 environmental test standards for electrical and electronic products, with complete type test reports available.

5. Full-function Intelligent Diagnosis Software for One-stop Fault Analysis, Cutting Clients' After-sales Technical Input

• Software functions: Real-time generation of 2D PRPD and 3D PRPS discharge spectra, built-in neural network defect identification algorithm that automatically distinguishes 6 typical GIS defects including metal particles, floating potential discharge and insulator air gap discharge, with automatic graded audio-visual alarms. It supports historical curves, report export, remote access and remote parameter configuration.
• Value for wholesale clients: After bulk supply, engineering contractors do not need to deploy a large number of professional partial discharge technicians, as the software automatically outputs defect diagnosis results and reduces on-site after-sales service frequency. It supports unified remote operation and maintenance for multiple sites, suitable for bulk procurement by group power operation and maintenance customers.
• Credibility support: The spectrum algorithm is trained based on thousands of groups of real GIS defect samples with fault identification accuracy ≥96%, complying with the defect judgment standard of DL/T 417.

The system adopts a three-layer complete set configuration, supporting split bulk procurement on demand to flexibly match general contracting project budgets:
1)Sensor Layer: External flat UHF sensors, stainless steel hoops, N-SMA coaxial signal cables, corrugated pipe protection kits; sensors and consumables can be purchased in batches separately according to the number of GIS bays.
2)Bay Acquisition Layer: MOEORW-5086U-220 partial discharge acquisition main unit, customizable with optional 4/8/16/30 channels freely combined for bulk orders.
3)Station Control Layer: 1U industrial control server, 19-inch cabinet monitor, system monitoring software, switch; supplied as a complete one-stop package to eliminate customers' multi-party procurement coordination costs.
4)Outdoor Complete Solution: Stainless steel outdoor monitoring cabinet integrated with acquisition unit, power supply and wiring terminals, ready for installation on site after unpacking, suitable for bulk implementation of new substations.

Standardized simple construction process reduces labor costs for bulk projects:
1.Sensor Installation: Stainless steel hoops fix sensors on the outer side of GIS basin-type insulators without drilling or damaging equipment; single sensor installation finishes within 10 minutes.
2.Cable Laying: N-SMA dual male coaxial cables protected by corrugated pipes, hard bending prohibited; complete set of grounding copper strands with cross-section ≥4mm² provided to meet power safety specifications.
3.Cabinet Installation: Standard 19-inch rack-mounted acquisition main unit, directly installable into existing substation cabinets; outdoor complete cabinets fixed on concrete foundation.
4.Power-on Commissioning: The system automatically synchronizes power frequency clock, the software searches all acquisition channels with one click and identifies sensors automatically, improving commissioning efficiency of bulk stations by 50%.