Detection of Saturation and Reconstruction of the Secondary Current of a CT
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During a short circuit condition, core of a Current Transformer (CT) may become saturated due to large primary current containing a significant DC component. The saturation of the core distorts the secondary current which may cause malfunction of the protective devices connected to the CT. As a result of significant advances in the technology and deployment of digital relays in the last decade, the distorted secondary current can be reconstructed in a very short time. Several methods, which take into account the non-linear behavior of the CT, have been researched in the recent past. Processing time, accuracy, and online implementation are of prime importance while selecting a particular algorithm. In this paper, a comprehensive review of the different algorithms used for the detection of saturation as well as reconstruction of the distorted secondary current is presented.
©2011 Walter de Gruyter GmbH & Co. KG, Berlin/Boston
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Articles in the same Issue
- Article
- Design of New Load Balancers for Modern High Speed Railway Systems
- Alleviation of Network Overloads Using Concept of Virtual Flows
- Forecasting of Short-Term Electric Load Using Application of Wavelets with Feed-Forward Neural Networks
- Efficient Market Design and Public Goods, Part I: Economic Models
- Efficient Market Design and Public Goods, Part II: Theoretical Results
- Classification of Power Quality Disturbances Using Parzen Kernels
- Detection of Saturation and Reconstruction of the Secondary Current of a CT
- A New Blocking Scheme for Distance Protection during Power Swings
- Unit Commitment by Structure Based Solution and Efficient Lagrangian Relaxation
- Modeling Shaft Damping of Turbine-Generator in Electromagnetic Transient Simulation
