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V&R Energy’s Project under PRSP: Grid Operator’s Monitoring & Control Assistant (GOMCA) Marianna Vaiman, V&R Energy JSIS Meeting March 3, 2015 Copyright © V&R Energy Systems Research, Inc. All rights reserved. 1
Project Team Project Participants - BPA, CAISO, IPC, Peak, SCE, SDGE Real-time monitoring and control based on the Region Of Stability Existence (ROSE) platform: – ROSE defines the range of phasor measurements or other system parameters for which the system may securely operate in terms of the accepted N-k security criteria Copyright © V&R Energy Systems Research, Inc. All rights reserved. 2
GOMCA Project Objectives Demonstration of V&R Energy’s Liner State Estimator (LSE) on realistic WECC network, including: – Observability analysis; – Bad synchrophasor data detection and conditioning; – Validation of cases created by LSE and their applicability to voltage stability analysis; – Based on the methods and algorithms that V&R demonstrated during NASPI Voltage Stability Workshop. Measurement-based analysis: – Measurement-based voltage stability analysis; – Automatic determination of corrective remedial actions; – Situational awareness wall to visualize in an easy effective way synchrophasor data, and results of voltage stability analysis; ROSE integration with EMS/PDC systems of the project participants; Technology transfer to project participants, training workshop. Copyright © V&R Energy Systems Research, Inc. All rights reserved. 3
Scope of Work 1. Prototype LSE study and Peak-ROSE at Idaho Power: – Prototype LSE study includes: Observability study; Methodology for identifying additional PMU locations; Bad data analysis and detection using LSE; LSE cases for IPC. – Idaho Power will use WSM cases from Peak for Peak-ROSE. 2. Peak-ROSE (“hybrid” ROSE) enhancements 3. LSE and ROSE integration at SCE and SDGE: – Interfacing ROSE with GE’s XA21; – Enhancing methodology for identifying additional PMU locations, if needed. 4. LSE at CAISO and Peak 5. Measurement-based voltage stability analysis, remedial actions, and visualization, based on the cases created by LSE 6. Technology transfer Copyright © V&R Energy Systems Research, Inc. All rights reserved. 4
Project Participant Expectations SCE – ROSE integration with GE’s XA21 and PDC to run both “hybrid” and PMU-based ROSE. SDG&E – ROSE integration with GE’s XA21 and PDC to run both “hybrid” and PMU-based ROSE. IPC – ROSE integration with EMS and PDC (will receive cases from Peak) to run “hybrid” and PMU-based ROSE. BPA – project observer/advisor. CAISO – supporting Peak in ROSE implementation and use of Linear State Estimator; integration of PMU-based ROSE. Peak – ROSE enhancements, and synchrophasor-based analysis. Copyright © V&R Energy Systems Research, Inc. All rights reserved. 5
Linear State Estimator Working with each participant: – To perform observability study MODEL WILL BE NEEDED Involves reading the SE data, topology processing if node-breaker model – Validation of the results of LSE for participant’s network/PMU installation; Copyright © V&R Energy Systems Research, Inc. All rights reserved. 6
Linear State Estimator (cont.) Incorporating algorithms for bad data detection and conditioning into LSE; Test the quality of the algorithms/data; Analyze the applicability of the cases created by LSE for voltage stability analysis; Do changes to LSE process, if needed, to create cases suitable for voltage stability analysis. Copyright © V&R Energy Systems Research, Inc. All rights reserved. 7
“Hybrid” Peak-ROSE Enhancements Peak prepared a list of enhancements To be discussed with V&R Copyright © V&R Energy Systems Research, Inc. All rights reserved. 8
“Hybrid” ROSE Integration The same computational functionalities as in Peak-ROSE Integration/customization is needed because State Estimator data and additional files needed for VSA analysis (contingencies, sources/sinks, monitored elements) come in different formats at different entities: – Working with participants to develop integration with their EMS; – Understanding the data; – Integrating ROSE. Copyright © V&R Energy Systems Research, Inc. All rights reserved. 9
Measurement-Based Analysis and Visualization Voltage stability analysis Automated corrective actions: – Automatically determine corrective actions – Work with participants: To implement remedial actions for their system; Validate the results of automated computations. Building situational awareness wall: – Displaying the results of the analyses via easy-to-understand GUI; – Customization for each participant. Copyright © V&R Energy Systems Research, Inc. All rights reserved. 10
ROSE Implementations Model - based ROSE: – State Estimator data is required at the rate available at the entity using the application, usually 3 to 5 minutes. “Hybrid”- based ROSE: – Phasor and State Estimator data sets are required: Phasor data at the rate available at the entity using the application, usually 30 samples/second. State Estimator data at the rate available at the entity using the application, usually 3 to 5 minutes. Implemented at Peak Measurement - based ROSE: – Phasor data is required the rate available at the entity using the application, usually 30 samples/second. – Will be demonstrated using the DOE project Copyright © V&R Energy Systems Research, Inc. All rights reserved. 11
ROSE Software Copyright © V&R Energy Systems Research, Inc. All rights reserved. 12 State Estimator is a part of the ROSE software. Can use V&R’s SE or export from an EMS vendor Model-based and measurement-based & hybrid State Estimator
“Hybrid”- ROSE Architecture Two analysis modes: Real-Time and Off-Line Inputs are: – State Estimator (SE) data, synchrophasor data, and additional files to perform voltage stability analysis (VSA) Copyright © V&R Energy Systems Research, Inc. All rights reserved. 13 Real-Time Mode
EMS ROSE Node-breaker model Alarming/Archiving / Visualization via Web Client PDC Synchronization with EMS and automatic reading of SE files (WSM Export) every 5 minutes; Using synchrophasor data in C37.118; Server-client application; Running as a service 24/7. Customized output; alarming; archiving; Output is in the format that is easily integrated with other applications. AC contingency analysis with real-time RAS; Computes interface limits; Performs PV-curve/QV-curve analysis. “Hybrid” ROSE Implementation at Peak Copyright © V&R Energy Systems Research, Inc. All rights reserved. 14
Measurement – Based ROSE Architecture One main input is synchrophasor data Additionally, we will need a power flow case to obtain model parameters, locations of PMUs, and additional files to perform voltage stability analysis (VSA) Copyright © V&R Energy Systems Research, Inc. All rights reserved. 15
Copyright © V&R Energy Systems Research, Inc. All rights reserved. 16 Measurement – Based ROSE Based on cases created by Linear State Estimator
Copyright © V&R Energy Systems Research, Inc. All rights reserved. 17 Uses of LSE The algorithms for new LSE were developed by V&R Energy: – Demonstration/validation for a realistic power system network will be performed during the current DOE project. LSE is based on PMU measurements of voltage and current: – Orthogonal component of voltage and current vectors is considered as the state variable Advantages of LSE: – Speed of state estimation due to using a direct non-iterative solution; – Improving quality of PMU data. – May replace conventional State Estimator (SE) when SE looses its output.
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