Active Distribution Networks Implications on Transmission System Stability
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Active Distribution Networks Implications on Transmission System Stability Diogo Marujo1 · A. C. Zambroni de Souza2 · B. I. L. Lopes2 · D. Q. Oliveira3 Received: 25 September 2018 / Revised: 7 January 2019 / Accepted: 28 February 2019 © Brazilian Society for Automatics--SBA 2019
Abstract Renewable power generation sources are imposing new operational challenges for power systems around the world. The traditional passive operating conditions may change since the power flow can reverse its direction under certain conditions. When the penetration of distributed generation is low, the effects comprise only distribution system. On the other hand, high distributed generation penetration may harm the whole system. In this sense, the connection of these sources can cause a considerable impact on operation and planning of transmission and distribution systems. This paper focuses on the implications on transmission systems when active distribution networks are considered. Dynamic studies are performed to assess the effects in transmission systems of renewable power generation connected to the distribution systems, considering different models and several operating scenarios. The consequences of applying complete and equivalent models are also investigated. The analysis and approaches presented here demonstrate the active distribution networks may influence transmission system behavior and also support that choosing the adequate model to represent the system is essential according to the kind of investigation someone is performing. Keywords Active distribution networks · Distributed generation · Renewable power · Dynamic simulation
1 Introduction Conventional electric power systems have been facing problems over the last years. The depletion of fossil fuel, the constant growth of load, environmental constraints and * A. C. Zambroni de Souza [email protected] Diogo Marujo [email protected] B. I. L. Lopes [email protected] D. Q. Oliveira [email protected] 1
Electrical Engineering Department, Federal University of Technology – Paraná, 4232th Brasil Av., P.B. 271, Medianeira, PR 85884‑000, Brazil
2
Institute of Electrical and Energy Systems, Federal University of Itajubá, BPS Av. 1303, P.B. 50, Itajubá, MG 37500‑903, Brazil
3
Institute of Electrical Energy, Federal University of Maranhão, Portugueses Av., 1966, São Luís, MA 65080‑805, Brazil
the growing dependence of the population and industry on electricity have demanded further studies on sustainability and investments been made in renewable power generation (RPG). In this scenario, a tendency to generate power at the distribution level by employing distributed generation (DG) has gained greater prominence. The integration of DG into distribution system (DS) is very promising. When the penetration of DG is low, the effects comprise only DS. On the other hand, high DG penetration may harm the whole system (De Leon and Ooi 2001). In this sense, the connection of these sources can cause a considerable impact on operation and planning of transmis
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