TRANSMISSION PRODUCT SOLUTIONS

e-terraphasoranalyticsphasoranalyticsphasoranalyticsphasoranalytics

Detecting grid vulnerabilities and extracting valuable insight into power system characteristics from synchrophasor big data Today’s transmission operators are dealing with new challenges. Besides the main mandates of running the system smoothly and reliably and increasing the system’s asset utilization, they also have to manage the challenge of integration a constantly changing portfolio of generation resources. The introduction of Phasor Measurement Units (PMU’s) have provided a wealth of new, real-time, data that can help both the operators and their team of control room operation, planning, protection and support engineers.

Alstom’s e-terraphasoranalytics provides an advanced diagnostic and data mining framework for utilizing historical synchrophasor measurement data from PMU’s, alongside other data sources (such as SCADA/EMS), within an interactive unified user interface. e-terraphasoranalytics allows engineers to perform offline analysis and forensics.

e-terrae-terrae-terrae-terraphasoranalytics is a state-of-the-art offline engineering analysis package that seamlessly integrates high-speed synchrophasor measurements with SCADA/EMS data and power system simulations.

Grid-NMS-L3-e-terraphasoranalytics-3091-2014_03-EN. Information contained in this document is indicative only. No representation or warranty is given or should be relied on that it is complete or correct or will apply to any particular project. This will depend on the technical and commercial circumstances. It is provided without liability and is subject to change without notice. Reproduction, use or disclosure to third parties, without express written authority, is strictly prohibited. Alstom contributes to the protection of the environment. This leaflet is printed on environmentally friendly paper.

MAIN FEATURES

� Multiple data sources support.

� Collaborative teamwork.

� Advanced analytics.

� Guided Workflow.

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POWER SYSTEM STABILIZER TUNINGe-terraphasoranalytics was used to identify local, inter-area and island modes and their damping and relative phase of oscillations. The contribution of other parts of the network to damping at the PSS location was also calculated. With the help of e-terraphasoranalytics a power-input PSS design that addresses the main dynamic issues of concern was selected and tuned for optimal performance.

TRANSMISSION PRODUCT SOLUTIONSe-terraphasoranalytics

KEY FEATURESe-terraphasoranalytics’ capabilities are focused on making the engineering investigation and exploration process simple, straight forward and productive. Some of its salient features include:

� Multiple data sources support: e-terraphasoranalytics brings data from various sources, such as PMU, simulation results, and SCADA/EMS into a single visualization and analysis context, which is required to successfully accomplish the envisioned uses of the application. For example, it is desirable to be able to compare and contrast the PMU observations against the simulation reconstructions across multiple domains (time-domain, frequency-domain, etc.) for dynamic model validation purposes. Similarly, post-mortem analysis requires both PMU data and SCADA/EMS data to effectively identify the sequence of events and understand the underlying root causes.

� e-terraphasoranalytics offers a unified platform for homogenizing data from multiple sources for consumption by its advanced analytics and for contextualizing within its interactive user interface.

� Collaborative teamwork: Collaboration among engineers for offline analysis has never been easier. e-terraphasoranalytics supports import of industry standards such as COMTRADE and CSV file formats. The workspace from one analysis workstation can be inherently shared with other workstations. The results of the analysis can be exported as data or figures.

� Advanced analytics: e-terraphasoranalytics offers various types of rich analytics integrated into the product that are well-suited for the types of usage envisioned for the product. Additionally, advanced parameters for fine-tuning the analysis are available for power users.

� Guided Workflow: e-terraphasoranalytics maintains an in-built and intuitive workflow, so that the user can focus on reviewing the results.

DYNAMIC MODEL VALIDATIONA significant disturbance in the summer of 2013 was captured by PMU measurements and carefully analyzed. When the event was reconstructed using the dynamic models, there was considerable deviation between the simulated and measured data.e-terraphasoranalytics was utilized to study the reasons for this mismatch. The application was able to identify the particular oscillatory mode (a 1.1Hz mode in this case) that was associated with the mismatch, along with the observability of this mode at various locations thereby suggesting the potential region and location within the system model associated with the modeling inaccuracy.

PMU Observations

CUSTOMER BENEFITSAmong the many benefits of the e-terraphasoranalytics solutionare:

� Quicker post-event analysis to identify sequence of events, associated root causes, as well as to assess the power system’s performance and response following these events.

� Improved dynamic models based on PMU observations captured in the field during grid disturbances.

� Established baseline knowledge of the dynamic performance characteristics for the grid (or power plant) to assess the “normal” dynamic behavior of the grid (for example, before/after generator commissioning), as well as to fine-tune similar oscillatory stability monitoring capabilities in the control room environment.

� Validated power system stabilizer controller design to ensure expected performance in damping of key oscillatory modes in the power system.

PSS OFF

PSS ON

Success stories

Simulation

Our customers from around the globe have been successfully using e-terraphasoranalytics alongside their synchrophasor investment to identify, assess, and address potential reliability concerns.

POWER SYSTEM STABILIZER TUNINGe-terraphasoranalytics was used to identify local, inter-area and island modes and their damping and relative phase of oscillations. The contribution of other parts of the network to damping at the PSS location was also calculated. With the help of e-terraphasoranalytics a power-input PSS design that addresses the main dynamic issues of concern was selected and tuned for optimal performance.

TRANSMISSION PRODUCT SOLUTIONSe-terraphasoranalytics

KEY FEATURESe-terraphasoranalytics’ capabilities are focused on making the engineering investigation and exploration process simple, straight forward and productive. Some of its salient features include:

� Multiple data sources support: e-terraphasoranalytics brings data from various sources, such as PMU, simulation results, and SCADA/EMS into a single visualization and analysis context, which is required to successfully accomplish the envisioned uses of the application. For example, it is desirable to be able to compare and contrast the PMU observations against the simulation reconstructions across multiple domains (time-domain, frequency-domain, etc.) for dynamic model validation purposes. Similarly, post-mortem analysis requires both PMU data and SCADA/EMS data to effectively identify the sequence of events and understand the underlying root causes.

� e-terraphasoranalytics offers a unified platform for homogenizing data from multiple sources for consumption by its advanced analytics and for contextualizing within its interactive user interface.

� Collaborative teamwork: Collaboration among engineers for offline analysis has never been easier. e-terraphasoranalytics supports import of industry standards such as COMTRADE and CSV file formats. The workspace from one analysis workstation can be inherently shared with other workstations. The results of the analysis can be exported as data or figures.

� Advanced analytics: e-terraphasoranalytics offers various types of rich analytics integrated into the product that are well-suited for the types of usage envisioned for the product. Additionally, advanced parameters for fine-tuning the analysis are available for power users.

� Guided Workflow: e-terraphasoranalytics maintains an in-built and intuitive workflow, so that the user can focus on reviewing the results.

DYNAMIC MODEL VALIDATIONA significant disturbance in the summer of 2013 was captured by PMU measurements and carefully analyzed. When the event was reconstructed using the dynamic models, there was considerable deviation between the simulated and measured data.e-terraphasoranalytics was utilized to study the reasons for this mismatch. The application was able to identify the particular oscillatory mode (a 1.1Hz mode in this case) that was associated with the mismatch, along with the observability of this mode at various locations thereby suggesting the potential region and location within the system model associated with the modeling inaccuracy.

PMU Observations

CUSTOMER BENEFITSAmong the many benefits of the e-terraphasoranalytics solutionare:

� Quicker post-event analysis to identify sequence of events, associated root causes, as well as to assess the power system’s performance and response following these events.

� Improved dynamic models based on PMU observations captured in the field during grid disturbances.

� Established baseline knowledge of the dynamic performance characteristics for the grid (or power plant) to assess the “normal” dynamic behavior of the grid (for example, before/after generator commissioning), as well as to fine-tune similar oscillatory stability monitoring capabilities in the control room environment.

� Validated power system stabilizer controller design to ensure expected performance in damping of key oscillatory modes in the power system.

PSS OFF

PSS ON

Success stories

Simulation

Our customers from around the globe have been successfully using e-terraphasoranalytics alongside their synchrophasor investment to identify, assess, and address potential reliability concerns.

TRANSMISSION PRODUCT SOLUTIONSe-terraphasoranalytics

BIG DATA ANALYTICSe-terraphasoranalytics was an invaluable tool for baselining the dynamic performance using long duration power system data (several weeks to months), to explore and understand the typical oscillatory behavior of their power system (i.e. local and inter-area modes, where they are observable, their typical damping levels, etc). This information was utilized to fine-tune and set alert/alarm parameters for the real-time Oscillatory Stability Monitoring (OSM) capability being used in the control room.

POST-EVENT ANALYSIS TO VALIDATE REMEDIAL ACTION SCHEME OPERATIONFollowing the loss of the HDVC link, the protection engineers at an utility were able to utilize e-terraphasoranalytics and PMU captures to swiftly identify the effectiveness of a RAS scheme in maintaining grid reliability.

For more informationplease contact Alstom Grid:

Alstom Grid Inc.

10865 Willows Rd. NE, RedmondWA 98052-2502, USA

Tel: +1 (425) 822 6800e-mail: transmission@alstom.com

Alstom Grid Worldwide Contact Centrewww.alstom.com/grid/contactcentre/

Phone: +44 (0) 1785 250 070

Visit us online: www.alstom.com

Grid-NMS-L3-e-terraphasoranalytics-3091-2014_03-EN. Information contained in this document is indicative only. No representation or warranty is given or should be relied on that it is complete or correct or will apply to any particular project. This will depend on the technical and commercial circumstances. It is provided without liability and is subject to change without notice. Reproduction, use or disclosure to third parties, without express written authority, is strictly prohibited. Alstom contributes to the protection of the environment. This leaflet is printed on environmentally friendly paper.

DISCOVERING NEW GRID VULNERABILITIESA US utility with major wind renewable energy resource in their energy mix was able to use e-terraphasoranalytics and its spectral analysis capabilities to analyze high resolution phasor data to access the impact of the wind farm on the system dynamics.

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