NYPA Implements RTDMS Integrated with Direct Non-Iterative State Estimator (DNSE+)
This is the first of its kind application where SCADA data was combined with PMU data to provide full visibility of underlying network. The project was funded in part by DOE with Quanta Technologies as the lead, EPG as technology provider and NYPA as a cost share partner and application host. DNSE uses both SCADA and PMU data in any proportion (validated by DataNXT) simultaneously to obtain the complete state of entire NYPA operating model at rates close to the PMU data rates without iterations. The DNSE is capable of utilizing nonlinear model equations, is robust and does not have non-convergence issues so it always provides a solution. The estimated results were streamed to RTDMS for real time visualization and situational awareness in control centers.
Powerplant retirements and transmission additions result in changes to phase angle limits at SCE
Baselining Analysis using 2 months of peak load data was done to update alarm limits on 18 key Angle Difference pairs in SCE footprint. The phase angle limits analyzed changes in SCE system since 2012, such as retirement of generating plants and commissioning of new transmission lines. SCE is using these alarm limits to monitor system stress in real-time using RTDMS.
EPG’s Ken Martin Receives IEC Award for work on Synchrophasor Standards
Ken received the IEC 1906 award in 2017, which “..recognizes exceptional and recent achievement - a project or other specific contribution - related to the activities of the IEC and which contributes in a significant way to advancing the work of the Commission”. Ken is a Principal Engineer at Electric Power Group and the convener of JTC1 which is drafting the Synchrophasor Standard IEC/IEEE 60255-118-1, a joint project with the IEC and IEEE.
Oman Electricity Transmission Company (OETC) starts commissioning Wide Area Monitoring System (WAMS) using EPG products
OETC owns and operates the main transmission grid of the Sultanate of Oman and transmits electricity from generating stations to distribution load centers in all regions of the Sultanate. EPG was selected after an internationally competed Tender for the design, supply, testing and commissioning of WAMS. The commissioning includes key EPG products such as enhanced Phasor Data Concentrator (ePDC), RTDMS as the real-time Wide Area Monitoring System (WAMS) for Dispatch Center and PGDA for Off-line analytics for use by engineers to validate models, establish alarm thresholds and analyze events - generation trips, line trips, and oscillations. EPG is also providing analysis services for baselining of the OETC grid using synchrophasor data.
Oscillation Workshop Hosted by WECC, Salt Lake City
A 2-day workshop covering theory and best practices for oscillation monitoring and detection was led by Professors Dan Trudnowski and Matt Donnelly of Montana Tech, John Pierre (University of Wyoming), and EPG’s Kevin Chen and Neeraj Nayak took place in August, 2017. Participants were major ISOs and utilities including PJM, NYISO, ERCOT, SPP, TVA, Peak RC.
ERCOT implements Grid Resiliency Solution with PhasorNXT
ERCOT is using PhasorNXT for a real time grid monitoring system independent of EMS/SCADA - providing a grid resiliency solution in the event of EMS/SCADA shutdown due to equipment failure or cyber-attack. PhasorNXT system includes DataNXT for data quality validation, enhanced Linear State Estimator (eLSE), Geospatial and One-line diagram displays for control room use.
PJM validates Oscillation Detection and Mode Meter Applications with Extensive Testing
The validation process was conducted using simulations, case studies, disturbance data, over a 6-month period. The testing has validated the algorithms used for oscillation detection and monitoring. PJM is now using the test results to develop operating guidelines.
NYISO tracks PMU performance with GridSmarts Reports
NYISO manages and tracks PMU performance through monthly reports from GridSmarts. Report includes overall PMU performance as well as breakdown of bad data for each PMU by error for use in data management business process.
Peak RC improves line impedance in its network model using EPG’s enhanced Linear State Estimator (eLSE)
The eLSE was used to identify and remediate faulty impedance values in their network model - used for traditional state estimation and contingency analysis. Peak RC is also using the eLSE for enhanced visibility beyond available PMUs; data conditioning and network model validation.
Southwest Power Pool (SPP) Utilizing RTDMS Mobile Solution
The mobile solution enables users to access RTDMS visualization through a web browser thereby offering a cost effective alternative to desktop software, with the added benefit of secure access on Android and iOS platforms.
PJM Using DataNXT for Managing PMU Data Quality
PJM receives data from 12 transmission companies and is using DataNXT to manage data quality to identify root causes for PMU data quality issues and establishing a business process for remediation.
NYISO to use Phasor Simulator for Operator Training (PSOT) for Alarm Validation and Operator Training
NYISO has acquired PSOT to replay significant grid events to establish alarm limits that are actionable by operators. PSOT is also planned for use to train operators on use of synchrophasor technology for managing the grid.
Eastern Interconnection Situational Awareness Monitoring System (ESAMS)
EPG is leveraging extensive baseline studies performed on the 4 Eastern Interconnection ISOs (PJM, NYISO, MISO, NE-ISO) to develop ESAMS to automatically identify angle difference and oscillation based abnormal system conditions and send alerts and reports to subscribers. This is a DOE sponsored project managed by CERTS with participation by PNNL and application hosting planned at PJM.
Composite Alarms in RTDMS Useful for Severe Event Detection and Operator Notification
Composite alarms were used to detect stressed grid conditions at ERCOT for PSOT. Composite of Phase Angle Differences and Power flow alarms were used to identify line outages combined with high phase angle differences alert operators for the next contingency. Customers are utilizing Composite alarms for different purposes such as alarms based on regions or zones; oscillation alarms based on a combination of metrics – MVAR and Voltage; alarms based on combination of Power Flows, Phase Angle Differences and Low Voltage Alarms.
SCE Increased Visibility from 13 to 52 Substations using EPG’s Linear State Estimator (eLSE)
SCE currently has PMUs from 13 substations sending data to their Grid Control Center. Using eLSE, the system observability was increased to 52 substations. The use of estimated values (virtual PMUs) was enabled with models and breaker status information and provides SCE an opportunity to prioritize and cost effectively select locations for PMU deployment.
The National Transmission Company of Dominican Republic (ETED) deployed EPG’s WAMS Solution with RTDMS
ETED is a state owned company responsible for the power grid. EPG deployed its RTDMS for real time control center situational awareness monitoring and PGDA for off-line grid analytics. Operators and Engineers have been trained on these applications and synchrophasor technology in Spanish, the local language.
NYISO Integrating Synchrophasor Data to Improve State Estimation
EPG’s ICCP Gateway was utilized to make synchrophasor data available for improved state estimation. The data is integrated with the state estimator voting scheme to provide improved solution.
AEP to monitor Substation Asset Health Using Synchrophasor Technology
DOE awarded a project to EPG to develop a substation asset health monitoring system with AEP as demonstration host and cost share partner. The project utilizes high-resolution synchrophasor data to check for precursor to failure, detect anomalies that may indicate equipment health issues, and sends early warning to substation personnel to proactively check equipment and take actions, like repairing or replacing the equipment. The project utilizes Substation level LSE (SLSE) and data-driven statistical anomaly detection methods to complement the SLSE.
APS performs System Model Validation for MOD-033 using PGDA
APS utilizes PGDA for system model validation by comparing PSLF simulated data against the PMU measured data to meet NERC MOD 33 requirement.
ERCOT Uses RTDMS for Oscillation Location and Root Cause Diagnostics
RTDMS Geospatial Map view with oscillation layer indicates the location of the oscillation and frequency band for root cause diagnostics of the oscillation. For example, forced oscillations in band 3 (1 – 5 Hz) were detected at a wind farm indicating local oscillations originating at that wind farm.
Southern Company Integrating Phase Angles with EMS Using EPG’s ICCP Gateway
To integrate synchrophasor intelligence with EMS/SCADA, Southern Company has deployed EPG’s ICCP Gateway. This will enable operators to obtain information on critical phase angles from key interfaces.
Duke Presents Grid Resiliency Solution with PhasorNXT at CERTS Meeting
Duke presented a grid resiliency solution for operators to use in the event of EMS being unavailable due to equipment failure or malicious cyber-attack. The PhasorNXT system utilizes independent communication circuits, data quality check with DataNXT, enhanced Linear State Estimator, Visualization using geo-spatial and one-line diagram displays with drill down capability to substations and buses. The system is planned for deployment at Duke Control Centers in Charlotte and Florida.
SCE trains operators on synchrophasor technology using simulated grid events
Using grid events simulated on EPG’s Phasor Simulator for Operator Training (PSOT), EPG and SCE conducted on-site training in SCE control center. The training used recorded and simulated extreme events. Operators learned about event precursors, monitored dynamic metrics during events, and were trained on corrective/preemptive actions. Events included monitoring and mitigation of local islanding conditions, monitoring and controlling local oscillations and using angle differences to help reclose line breakers.
NYISO Utilizes Phase Angle Operating Procedure for Grid Instability
NYISO operates the transmission system serving New York City. Phase angles at key interfaces are monitored in RTDMS for grid stability. When phase angle differences exceed safe levels indicating potential for instability during contingencies, NYISO implements an operating procedure to increase local generation and reduce vulnerability to extreme events.
BPA deploys enhanced Linear State Estimator (eLSE)
BPA tested and validated eLSE for synchrophasor data validation and conditioning by replacing raw values with estimated values. eLSE was validated for use with archived data and real time streaming data at 60 frames per second. The eLSE enabled BPA to obtaining full observability of the 500 kV system and portions of the 230 kV system as eLSE enhanced the observability with estimated values for locations without PMUs.
ERCOT mined 3-years of synchrophasor data to identify dominant oscillations for real-time monitoring
EPG mined 3 years of ERCOT archived data for Use in Event Analysis, Model Validation and Operations. The PGDA and Automated Event Miner (AEM) were used to perform batch processing on historical data to identify events and report events by time, location, severity and possible root cause. The event mining identified dominant oscillations for real time monitoring using RTDMS.
Dominion Energy (Virginia Power) Utilizes RTDMS Dual Profile Clients to monitor Dominion and PJM footprints with the same Client software
Dominion deployed a dual profile RTDMS client that enables operators to view the PJM RTDMS Visualization and the Dominion RTDMS Visualization with the same Client software.
PJM validated RTDMS security with independent Cyber Security Penetration Testing
As part of acceptance of RTDMS for production environment, PJM retained a third-party for independent penetration testing of RTDMS software. All identified issues were addressed satisfactorily.
BPA receives Platts award for Innovative Project with ePDC
BPA utilized ePDC in a multimillion dollar project to collect data from real time synchrophasor data streams (PMUs and PDCs), concentrate and time align the data, and distribute the data to different applications with 39 simultaneous outputs, each with different data rates and signals using ePDC.
ERCOT performs event analysis using PGDA on a daily basis
Event analysis is conducted using PGDA and report templates are used to generate and distribute event reports to internal stakeholders. Events analyzed cover oscillation events, generation trip events, frequency response analysis and perform ring-down analysis to identify participating modes in an event. Analysis is used in planning, engineering and operations for example, to validate alarm levels for configuration in RTDMS.
Dominion and NYISO address the challenge of large data extraction using the enhanced Phasor Data Extractor (ePDE)
To address the challenge of efficient large data extraction, EPG developed the ePDE which was validated by Dominion under different use scenarios. This reduced their data retrieval time by 60%.
Duke integrates synchrophasor alarms with EMS using EPG’s DNP3 Gateway
Operators need critical alarms available in one system. To complement EMS/SCADA, Duke utilizes EPG’s DNP3 Gateway to send alarms on dynamic metrics to EMS so that operators have the benefit of alarm information from synchrophasors and the EMS in the same system. Dynamic metrics, measures of system dynamic activity, are observable through synchrophasors and not the regular SCADA.
ERCOT completed Train-the-Trainer sessions using PSOT
EPG trained trainers at ERCOT who will train system operators during regularly scheduled training cycle. The goal was to provide training on Synchrophasor technology to detect events otherwise unobservable through SCADA/EMS system and take corrective/preemptive actions. Events include monitoring and controlling oscillations at a wind farm, and monitoring angle differences to prevent local blackout conditions as well as extreme events involving generator trips and line trips.
201 South Lake Avenue, Suite 400, Pasadena, CA 91101
Electric Power Group, LLC (EPG) has been pioneering the development and deployment of synchro-phasor technologies since 2000. Our principals have extensive experience in running and managing utility grids, investigating root causes of major blackouts (WECC 1996, EI 2003), and leveraging this deep domain knowledge to develop industry leading synchrophasor technology applications for wide area real time monitoring, visualization and situational awareness.
The EPG team has extensive hands-on experience with synchrophasor standards, networks, system architecture, deployments and performance analysis through work at EPG for leading ISO's and utilities including PJM, NYISO, ERCOT, CAISO, MISO, BPA, TVA, SCE, AEP, LADWP, SRP, Duke, Dominion, NYPA and other companies.