Transient Stability Analysis of a Distribution Network With Distributed Generators

Abstract

Abstract-This

Three-Phase Dynamic Simulation of Power Systems Using Combined Transmission and Distribution System Models

“…Many of these studies have used balanced network representations of distribution systems [3], [4] and/or small networks to test their approaches [3]- [7]. The authors in [8] developed models for synchronous DGs and Doubly Fed Induction Generators (DFIGs), and used PSCAD/EMTPDC software to perform transient stability studies on unbalanced networks with DGs.…”

Allowable capacity of ACDG considering inverse time overcurrent protection

“…The setting of the inverse time overcurrent protection starts from the end of the line. For relay 3, the pickup current (I pickup3 ) is set according to Equation (1). When a three-phase short circuit occurs at f 1 , the trip time can be set as t b (inherent trip time of relay).…”

“…max and t b , a point a 3 in curve 3 can be fixed, then, the value of K 3 can be obtained. The pickup current (I pickup2 ) of relay 2 is still set according to Equation (1). However, when fault occurs at f 1 , the trip time of relay 2 must be longer than relay 3, in order to ensure the selectivity of protection.…”

“…However, the integration of DGs adds new power supplies to the grid, which provide additional fault current during the fault. The additional fault current has many bad impacts on the reliability of protection, and this has been analyzed in many previous researches [1][2][3].…”

Impact on critical clearing time after integrating large-scale wind power into Taiwan power system

“…In [9], the transient stability analysis of a distribution network with different types of distributed generators (DGs) had been investigated, in which the fault simulation at various locations was also carried out to determine the CCT; the study revealed that the optimal utilization of DG's fault ride-through capability can improve system transient stability. The strategy of increasing maximum CCT was studied in [10]; it proposed a coordinated voltage scheme, in which the voltage controllers of the STATCOM and onload tap changer (OLTC) on transformers in a wind farm were coordinated each other and to ensure the voltage support during the steady-state and contingency operations.…”