Design and Implementation of a Parallel-Connected Fault Current Attenuator for Power Distribution Systems
| Autor: | Jaime Rohten, Esteban S. Pulido, Jose Manuel Silva, Felipe Villarroel, Jose Espinoza, Luis Moran, Isaac Gonzalez-Torres |
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| Rok vydání: | 2022 |
| Předmět: |
Attenuator (electronics)
Computer science business.industry Electrical engineering Energy Engineering and Power Technology Hardware_PERFORMANCEANDRELIABILITY Current source Fault (power engineering) Power (physics) Electric power system Limiter Electrical and Electronic Engineering Current (fluid) business Circuit breaker |
| Zdroj: | IEEE Journal of Emerging and Selected Topics in Power Electronics. 10:402-412 |
| ISSN: | 2168-6785 2168-6777 |
| DOI: | 10.1109/jestpe.2021.3081048 |
| Popis: | Parallel-connected fault current attenuator (PFCA) is a novel concept for active reduction of short-circuit currents through circuit breakers in power distribution grids. The sustained increase in the short-circuit currents could exceed the rating of the circuit breakers, dangerously spreading the fault. Several series-connected schemes to reduce these high currents, such as fault current limiters and series reactors have been proposed in recent decades. This paper designs and experimentally verifies the feasibility of a parallel-connected power converter to reduce the short-circuit currents, operating as a controlled current source by absorbing current from the fault point. This new configuration reduces the short-circuit currents in all circuit breakers of an electrical substation. The proposed parallel-connected fault current attenuator is implemented using a single-phase neutral-point clamped (NPC) converter and tested using a predictive current control scheme for short-circuits in a scaled-down power system. The experimental results prove the effectiveness of the proposed scheme, reducing significantly the first short-circuit current peak, even when the AC bus voltage is close to zero. |
| Databáze: | OpenAIRE |
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