PMU data characterization and application to stability monitoring
- 1 January 2006
- conference paper
- conference paper
- Published by Institute of Electrical and Electronics Engineers (IEEE)
Abstract
This paper provides a methodology to characterize the accuracy of PMU data (GPS-synchronized) and the applicability of this data for monitoring system stability. GPS-synchronized equipment (PMUs) is in general higher precision equipment as compared to typical SCADA systems. Conceptually, PMU data are time tagged with precision better than 1 microsecond and magnitude accuracy that is better than 0.1%. This potential performance is not achieved in an actual field installation due to errors from instrumentation channels and system imbalances. Presently, PMU data precision from substation installed devices is practically unknown. On the other hand, specific applications of PMU data require specific accuracy of data. Applications vary from simple system monitoring to wide area protection and control to voltage instability prediction and transient stability monitoring. The paper focuses on the last application, i.e. transient stability monitoring. We propose an approach that is based on the energy functions (Lyapunov indirect method). Specifically, we provide a methodology for determining the required data accuracy for the reliable real time estimation of the energy function. When the data meet these requirements, the estimated energy function can be visualized and animated providing a powerful visual tool for observing the transient stability or instability of the systemKeywords
This publication has 9 references indexed in Scilit:
- Dynamic data---Dynamic data-driven applications systemsPublished by Institute of Electrical and Electronics Engineers (IEEE) ,2006
- A virtual environment for protective relaying evaluation and testingPublished by Institute of Electrical and Electronics Engineers (IEEE) ,2005
- A Virtual Environment for Protective Relaying Evaluation and TestingIEEE Transactions on Power Systems, 2004
- Role of laboratory education in power engineering: is the virtual laboratory feasible? III. Virtual power system laboratories: is the technology readyPublished by Institute of Electrical and Electronics Engineers (IEEE) ,2002
- On-line correction of errors introduced by instrument transformers in transmission-level steady-state waveform measurementsIEEE Transactions on Power Delivery, 2000
- Multifunctional synchronized measurement network [power systems]IEEE Computer Applications in Power, 1998
- Transmission level instrument transformers and transient event recorders characterization for harmonic measurementsIEEE Transactions on Power Delivery, 1993
- Effects of modeling on the accuracy of harmonic analysisIEEE Transactions on Power Delivery, 1990
- Modeling and analysis of URD cable systemsIEEE Transactions on Power Delivery, 1990