Network Analysis and Diagnostics (Network AD) is a powerful tool that is part of CONPROVE’s communication network monitoring and diagnostic solutions for digital substations based on the IEC 61850 standard: CE-RNET4 (rack-mounted version) and CE-MNET4 (portable version).

Designed to meet (and exceed) the minimum requirements described in the revision of ONS submodule 2.11 – item 7, the software controls the processing unit via remote access on a local or remote (cloud) network and features a fully user-friendly and intuitive interface. There are several features that make the system extremely powerful, while at the same time easy to operate and self-explanatory.

Main software features:

• Check IEC 61850 communication;

• Analyze network traffic;

Statistical and performance analysis:

• Perform statistical analysis of GOOSE and Sampled Values messages;

• Evaluate message performance;

• Detect and signal the absence of expected messages;

• Detect and signal the presence of unexpected messages;

• Detect and signal issues in GOOSE, SV, and PTP messages;

• PRP network monitoring;

• IED monitoring via Client/Server (MMS) communication;

• Capture network messages;

• Send network fault event alarms to the SCADA system via MMS or GOOSE, configurable by the user.

Event Monitoring Details

GOOSE

• TTL expired – Detects if message sending is interrupted beyond a defined time.

• Out of sequence – Detects lost or out-of-order messages.

• Formatting error – Detects if the message was corrupted.

• Transfer time exceeded – Checks if the GOOSE transfer time exceeds the defined limit.

• SCL comparison – Compares all message fields and indicates differences from the SCL file.

• Never seen – Identifies if a message has not been received for a set maximum time.

• GOOD validity changed – Detects changes in the “Good” status in Quality Bits.

• Test Bit changed – Detects changes in the Test Bit in Quality Bits.

• Time Quality bits changed – Identifies alterations in Time Quality bits.

• Clock unsynchronized – Checks if the synchronization status bit changes.

• Fast StNum change – Detects multiple GOOSE events in a short time.

• Appeared – Detects if a message was sent after a “Never seen” event.

Sampled Values

• Timeout – Detects message interruption beyond a defined time.

• Out of sequence – Detects lost or out-of-order messages.

• Formatting error – Detects if the message was corrupted.

• Processing delay – Checks if SV data processing time matches definitions.

• Time between frames – Verifies if frame intervals match sampling rates.

• SCL comparison – Compares all message fields with SCL definitions.

• Never seen – Identifies if a message has not been received for a defined time.

• GOOD validity changed – Detects changes in the “Good” status in Quality Bits.

• Test Bit changed – Detects changes in the Test Bit in Quality Bits.

• Clock drift – Detects if the clock is drifting.

• Sync flag changed – Detects synchronization flag changes.

• Clock unsynchronized – Detects loss of synchronization.

• Appeared – Detects messages sent after a “Never seen” event.

PTP

• Missing messages – Detects absence of Grand Master (GM) PTP messages.

• Time between messages – Checks if intervals match profile definitions.

• Message loss – Detects lost GM messages.

• Master precision changed – Detects changes in GM precision.

• Clock class changed – Detects changes in GM clock class.

• UTC offset updated – Detects changes in UTC offset.

• Master active – Detects when the GM becomes active.

• Appeared – Detects GM messages after a “Missing” event.

PRP Redundancy

• Out of sequence – Detects message loss or delay.

• LAN crossover – Detects crossing of PRP LAN A and B.

• Duplicate reception – Detects duplicate message reception on both LANs.

• No PRP tag – Detects messages without PRP tagging.

• Incorrect PRP definition – Detects PRP tags differing from configuration.

• SV message loss – Detects loss of SV messages with PRP tag.

• GOOSE message loss – Detects loss of GOOSE messages with PRP tag.

• PTP message loss – Detects loss of PTP messages with PRP tag.

• Other message loss – Detects loss of other PRP-tagged messages.

Device

• Overload – Detects device processing overload.

• Optical signal degradation – Detects optical signal degradation.

• Synchronization established – Detects when synchronization is achieved.

• Synchronization lost – Detects when synchronization is lost.

• Link established – Detects link status for each port.

• Link lost – Detects link loss for each port.

Others

• Unexpected GOOSE – Detects GOOSE messages not defined in SCL.

• Unexpected SV – Detects SV messages not defined in SCL.

• User-defined – Monitors any GOOSE message outside the SCL file.

Severity levels: Events can be classified as Critical, Warning, or Information.

User-configurable parameters: Specific events in GOOSE, SV, PTP, PRP, Device, and custom user-defined events can be fully configured.