Legacy transformer monitoring and diagnostic system (TMDS 2000 L)


The product family - asset management solutions


Siemens offers a comprehensive suite of solutions designed to support the full spectrum of customer asset management needs. The individual product solutions are tailored to address the discrete stages of asset management depicted by the triangle below. The Siemens Legacy Transformer Monitoring and Diagnostic System (TMDS 2000 L) is a different breed of monitoring and diagnostic system. The configuration of the TMDS 2000 L described here is particularly will suited for use on the generation step up (GSU) transformer.


The solution - asset management solutions - actionable data


The TMDS 2000 L captures data regarding the operational performance and condition of the transformer, but more importantly it delivers contextual information that:

  • Recommends maintenance activity to address abnormal operation

  • Provides information on potentially related or causal relationships between transformer components and the alarmed condition

  • Reduces time consuming data analysis, delivers statistically relevant abnormal operating data and alarm conditions first, followed by raw data for further review.

  • Incorporates loading recommendations through the adaptation of models using actual field condition assessment data.

Scalable solution


Not all GSUs are of equal importance in terms of their contribution to system reliability and cost of generation. Because of this fact, the TMDS 2000 L allows the asset owner to tailor the functionality of the system in three major areas. Functions in these areas are selected to match the investment required with the specific needs of the subject transformer. The resulting system is a cost effective solution configured to deliver optimized protection to the transformer.


Data acquisition


The client can tailor the sensor suite to be installed on the transformer to yield the readings required to support a data acquisition scheme based on GSU condition, importance to the system, and existing maintenance strategy.


Data integration


The data can be gathered and analyzed at the substation level with exception reporting, or it can be integrated at the substation level with exception reporting, or it can be integrated into a centralized location (i.e., operation or engineering). This flexibility allows delivery of the right data to the right person in context of their need. Data can also be stored offline and accessed at a later time for detailed analysis by asset specialists. The automation platform used for data communication and management can support individual as well as multiple transformers. For this application, the platform is quite robust in data handling bandwidth, thus each transformer specific conditions or operational requirements.


Data analysis


The functionality of the analysis modules can be added or deleted based on customer preference. The analysis modules can be made available online or offline. The customer can select from a suite of analysis applications. Available applications can include dissolved gas analysis (DGA) using proven methods (e.g., Duval's Triangle, Roger's Ratios), trending and statistical variance analysis, and thermal models using established IEC and IEEE methods.


Specifically configured for legacy transformers


Legacy transformers are unique in that they each have a specific opeational history. This history should be understood and accounted for in the monitoring and daignostic system. The TDMS 2000 L allows condition assessment data to be incorporated into the configuration of alarms and recommended loading to mitigate the risk of failure while preserving operation. Although no system, including the TMDS 2000 L, can guarantee avoidance of failure, the TMDS 2000 L can utilize the results of field based condition assessments and advanced monitoring and diagnostic technology to provide a comprehensive tool to support any asset management strategy.


The bottom line - customer benefits


The TMDS 2000 L applied to GSU transformers offers the following benefits:

  • Exception reporting or abnormal condition alarms are generated by email or pager directing system users to a structured "Report" of condition that includes a diagnosis, recommendations, prognosis, and tendency information.

  • Optimization of transformer operation based on measured condition

  • Configurable to monitor a single transformer or simultaneously monitor an entire fleet of transformers, thus providing true fleet-wide protection

  • System design allows for expansion over time.

  • 24 hour access to current operational data and historical operating trends from a central location or remotely

  • All data collected is available for review and remote download.

TMDS 2000 L can be tailored to integrate and deliver the right data, to the right personnel, with contextual and actionable data. Using its suite of advanced tools for diagnostic analysis, you can improve the bottom line through the optimization of your prevailing asset management strategy.