IEEE 1588 Upgrade

IEEE 1588-2008 is the technical solution designed to provide cost effective time synchronization from devices in a substation up to the whole utility grid. The challenge to implementing 1588 in a substation is interfacing with devices that only support legacy time synchronization methods. The MultiSync 100 1588 GPS Clock is a cost-effective solution to this challenge. Compact size, with DIN rail mounting, provides great flexibility in installation. Network and analog output ports allow interfacing into legacy time synchronization networks while simultaneously providing IEEE 1588 signals.

The MultiSync 100 supports common network time synchronization methods, including IEEE 1588, C37.238 and SNTP/NTP. The MultiSync 100 also supports common analog methods of time synchronization, including IRIG-B, TTL, and user defined pulse methods. The network and analog methods can be supported simultaneously in the MultiSync 100. One compact, affordable MultiSync 100 GPS Clock can provide timing synchronization for 1588 compliant devices and legacy devices in the substation, providing a simple, low cost upgrade path.

End-to-End Solution for IEEE 1588

The MultiSync 100 is part of a complete end-to-end 1588 time synchronization solution for power system substations and industrial applications. This solution includes:

• MultiSync 100 operating as a GrandMaster clock
• MultiLink ML3001/ML3100 Ethernet switches with 1588 modules
• Universal Relays and 8 Series relays time synchronized to the MultiSync 100

Connection Drawings

Specifications

The Intellix BMT 330 continuously monitors the condition of bushings in real-time and provides end users with the information they are used to receiving from off-line tests, namely changes in capacitance and power factor (tan delta), to assess the bushing dielectric efficiency and insulation integrity.

Using custom made adapters connected at the bushing tapping points, the Intellix BMT 330 measures:

• The change in bushing leakage current compared with the original values calculated from the bushing nameplate information.
• The timing differences between the 3 bushing current phases, which translate to phase angle differences relative to each other.

The Intellix BMT 330 measures both oil and ambient temperature. It correlates capacitance changes linked to thermal expansion of the bushing and compensates for the measurements being made at actual bushing operating temperature compared with nameplate values obtained off-line.

PD is a localized breakdown of a small portion of a solid or fluid electrical insulation system that is under high voltage stress, which does not completely bridge the space between two conductors. PD results in localized gradual erosion of the insulation system that eventually leads to failure of the critical insulation between transformer windings. Using the same bushing adapters, the Intellix BMT 330 offers the added advantage of measuring high frequency signals in order to monitor PD activity, giving an added level of protection for the main tank of the transformer.

The amplitude of the PD pulses, as well as the number of pulses, are recorded and used to calculate an overall measure of PD activity. Several methods are used to discriminate between internal PD and external noise (corona discharge).

The Intellix BMT 330 can easily be integrated with GE Vernova's Kelman DGA analyzer, giving the end user a unique all-in-one solution that provides a more comprehensive view of the transformer's overall condition, from bushing diagnostics and PD, to complete main tank monitoring.

Having an all-in-one integrated solution from GE Vernova will significantly increase the ability to detect potential transformer problems at an early stage. The system will provide status on:

• Deterioration of the bushing insulation
• Partial discharge activity
• Moisture content in oil
• Developing key fault gases H₂, CO, C₂H₂, C₂H₄, C₂H₆, CO₂ and CH₄

This helps to decrease the risk of unplanned downtime and improve network reliability.

GE Vernova's Perception software allows an operator to easily download and visualize the data available from a critical transformer and use it to make better, more informed decisions. The software is an upgradeable tool, allowing users to view all relevant transformer data from one centralized point .

Having a one-source provider for complete transformer monitoring activities can effectively lower installation costs, as well as reduce the administrative burden of coordinating various maintenance crews. GE Vernova has extensive experience and worldwide resources available to deliver integrated monitoring solutions and assist customers with transformer challenges, including installations, commissioning, training and on-going technical support.

Substation Automation Example

The application below showcases an integrated solution for bushing and transformer main tank monitoring utilizing the Intellix BMT 330, the Kelman DGA analyzer and the Perception software for data analysis.