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- Type of Document: M.Sc. Thesis
- Language: Farsi
- Document No: 39898 (05)
- University: Sharif University of Technology
- Department: Electrical Engineering
- Advisor(s): Ranjbar, Alimohammad
- Abstract:
- One of the most essential part of power system are transmission lines. Transmission of power from production centers to consumption centers is duty of these lines. Any disturbance in this duty make great losses to producers and consumers. One of the most disturbance in transmission lines are short circuits that occurred because of various causes. Most faults on transmission lines occurred in stormy weather that make more troubles for fault search. So we need a tool that can find location of fault precisely and quickly. This tool named fault locator. There are many algorithms for fault location and detection on power system transmission lines. These algorithms usually are dependent on very accurate measurements. Accuracy of measurement units is limited. Besides this limitation, sometimes we have bad data in our measurements in power system, such as current transformer saturation while there is a short circuit incident in power system lines. The thesis describes new algorithms for fault location and detection on power system transmission lines. Algorithms are based on Weighted Least Square State Estimation. So we can include measurement units accuracy and existence of bad data in power system, in fault location. After introduction of new method for location of every kind of fault, this algorithm will be developed for single line faults and double lines to ground faults. We can see evaluation of these algorithms in this thesis. At the end of thesis a new algorithm for finding faulted line will be proposed.
- Keywords:
- Fault Detection ; Transmission Lines ; State Estimation ; Phasor Measurement Unit ; Fault Location
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