Distributed generator status estimation for adaptive feeder protection in active distribution grids

Abstract

ABSTRACT

Topology and parameter estimation in power systems through inverter‐based broadband stimulations

“…There are N injecting emitters on the network, and the matrix V S represents the Discrete Fourier transform of all voltage stimulations. At the M receivers, the resulting broadband current is measured and is correlated with the PRBS codes of the N senders according to equations (3). A correlation peak is detected when the signal is present.…”

“…Examples of such parameters are transmission line parameters, status of power switches and distributed generators (DGs) [1]. The most important EMS tool is state estimation, but other state‐of‐the‐art tools such as network topology reconfiguration [2], adaptive feeder protection in presence of DG [3, 4] use the grid model as well in order to optimise power‐flows and guarantee proper behaviour of the protective devices.…”

Effect of Distributed Photovoltaic Generation on Short-Circuit Currents and Fault Detection in Distribution Networks: A Practical Case Study

“…However, this situation has changed with the greater importance of renewable energy [23], and other ways to reduce power production from the traditional energy sources that have a negative impact on the climate (e.g., the use of electric vehicles as power sources [24][25][26][27][28][29]). Within the networks with DG, such as the ones with photovoltaic generation located in different points of the grid, the coordination between protection devices might fail [30][31][32][33][34][35][36][37][38]. Additionally, each kind of renewable energy source presents new fault modes in a network.…”