High-impedance fault location has always been a challenge for protection engineering. On the other hand, if this task is successfully realized, maintenance action could be performed in order to avoid potential injuries. For an effective scheme, high-impedance should performed, but lack of research on area noted. This paper proposes new analytical formulation power systems. The approach developed time domain, considering model consisting two antiparallel diodes. Using model, distance and...

Protection schemes are essential in active distribution networks and microgrids' reliable, efficient, flexible operation. However, the protection of these presents significant challenges due to operational changes, such as variations topology, distributed energy resources connection/disconnection, microgrid operating modes, among others. This paper proposes an adaptive scheme based on overcurrent devices with several setting groups artificial intelligence algorithms. The developed strategy...

The integration of distributed energy resources (DERs) in electric distribution networks originates the Active Distribution Networks (ADNs). presence DERs introduces challenges to conventional protection schemes due bidirectional power flows and variations fault current magnitudes; furthermore, connection disconnection result multiple ADN operating modes (OMs), deteriorating effective operation protective relays. Considering above, this document presents an adaptive strategy address related...

Incipient faults in underground shielded cables can affect greatly distribution system reliability. These are usually a consequence of gradual aging process on cable isolation material and over time become permanent faults. This paper presents an incipient fault location method for networks with cables. The is composed by domain model parameter estimation approach. derived using phase component representation voltage current signals, considering 1-terminal measurements realistic hypotheses....

Modern fault location methods are robust; however, they depend strongly on the availability of measurements given by Distributed Energy Resources (DER). If communication or synchronism this information is lost, not possible. This paper proposes an adaptive impedance-based algorithm for active distribution systems. The proposal combines provided Intelligent Electronic Devices (IEDs) located at substation, knowledge network topology and parameters, as well distributed power sources, to...

This paper shows the influence of load modeling in behavior voltage (V), current (I) and impedance (Z) measurements during pre-fault fault steady states power distribution systems. The test system is 24.9 kV IEEE 34 nodes system, modeled by ATP software, considering models as constant impedance, current, hybrid composed using previous three models. All loads were coded Models ATP. As result test, a comparative analysis signals V I also Z seen from substation performed. that model affects...

This paper presents an analysis about the impact of inverter-based distributed generation on fault location for distribution power systems. work analyses response in and how it impacts formulation. Additionally, is presented electrical models DG its influence performance. study performed IEEE 34 Node Test Feeder. The obtained results show that not consider current contribution inverter or use inadequately model to determine affect strongly performance, since distance computed depends...

Context: The use of capacitor banks is the most common and preferred solution for reducing power loss in electrical distribution networks, given their cost-effectiveness low maintenance requirements. However, achieving optimal integration terms location size a challenging problem. Method: This paper proposes stochastic mixed-integer convex model based on branch flow optimization model, which incorporates three different load-generation conditions, order to address nature systems.Results:...

This paper presents a methodology for passive filter allocation within an electrical unbalanced distribution system aiming to reduce harmonic distortion. Harmonic distortions are usually eliminated using filters, however, their in the requires attention. An inadequate of filters might harm Power Quality (PQ) and can increase distortion at other buses by flow changes. We consider that single-phase. The is based on modeling simulation Alternative Transient Program (ATP/EMTP) Matrix Laboratory...

This paper addresses the problem of output voltage regulation a boost dc-dc converter supplying an unknown constant power load (CPL). An interconnection and damping assignment passivity-based control (IDA-PBC) approach is employed to design closed-loop controller taking advantage port-Hamiltonian structure under average modeling. adaptive online method estimate CPL consumption made by guaranteeing asymptotic stability in Lyapunov's sense for operation. Numerical validation between nonlinear...

The inclusion of Distributed Generation (DG) leads Active Distribution Networks (ADN) to face protection challenges due the presence bidirectional flows and low short-circuit levels provided by these new sources. As network operators require schemes solve problems associated with DG, they must choose techniques that best adapt existing analyze implementation cost. In this context, Smart Grid Architecture Model (SGAM) emerges as a technique categorize public service processes within...