A method to detect and locate faulted area in distribution systems using the existing measurements structure
| Autor: | Debora Rosana Ribeiro Penido, Paola A. Guaracy, Leandro Ramos de Araujo, João Tito Almeida Vianna |
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| Rok vydání: | 2021 |
| Předmět: |
Ground
business.industry Computer science 020209 energy 020208 electrical & electronic engineering Real-time computing Phasor Energy Engineering and Power Technology 02 engineering and technology Fault (power engineering) Automation Fault detection and isolation 0202 electrical engineering electronic engineering information engineering Node (circuits) Electrical and Electronic Engineering business Electrical impedance Voltage |
| Zdroj: | International Journal of Electrical Power & Energy Systems. 131:107073 |
| ISSN: | 0142-0615 |
| DOI: | 10.1016/j.ijepes.2021.107073 |
| Popis: | This paper presents a low-cost method for detection and area location of impedance faults to ground in medium voltage of unbalanced Distribution Systems (DS). The method is called Zero-Sequence non-synchronized Protection (ZSNP) and its economic feasibility is based on the use of conventional measurements (non-synchronized RMS), which are already installed on DS. The name “non-synchronized” derives from the fact that ZSNP is based on non-synchronized RMS measurements (current angle is not necessary) and fault location relies on RMS differential zone, defined by two points of measurement. In the ZSNP method, the data is sent to a control center, and faults are detected by analyzing the phasor magnitude of zero-sequence currents on distribution feeders. The method has special application for DS with medium voltage grounding reference only at the substation. The method may also be applied to multi-grounded systems, but the efficiency is usually reduced. A practical simulation with RTDS and a real automation equipment is also presented for validation. ZSNP was tested in the IEEE 37 and IEEE 123 Node Test Feeders and results demonstrated fault detection rates greater than 95%. The method did not present any false positive result, that is, it does not erroneously indicate the existence of fault. Economic analysis and comparisons with other methods were performed. The high success rates demonstrate that the method can be applied in real DS to identify faults that traditional protection may not detect. |
| Databáze: | OpenAIRE |
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