A First Approach on the Impact of Distributed Generation on Voltage Sags

Abstract

An analysis of the distributed generation (DG) impact on studies of voltage sags caused by system faults is presented. The simulation of 62 case studies of phase-to-ground faults on 13.8, 69, 138 and 230 kV transmission lines were performed and the voltage of a 380 V sensitive industrial busbar client was monitored. These lines are part of the electrical system of the city of Goiania, Brazil. For each case study, different fault positions were simulated by considering different DG levels connected to the consumer busbar. Long-term simulation scenarios were obtained by the Monte Carlo method and analyzed based on their cumulative distribution functions and probability density curves of voltage sags. This is one major contribution of this work.

A First Approach on the Impact of Distributed Generation and network topology on Studies of Voltage Sags

“…Voltage sag is a reduction in rms value of source voltage, in one or more phases of the system, to values between 10% and 90% for periods of time between half cycle and 1 minute [3] and it characterized by its magnitude (the retained voltage), phase-angle jump, unbalance and duration [1]. There are many factors that influence voltage sags and some of them have received considerable attention from the researchers as, for example: the fault characteristics (location [4], type [4], impedance [5], [22] and fault Distribution [6]), pre-fault voltage [7], fault rate [8], protection system [9], reclosing system [9] and the system generation level [2], [23].…”

A First Approach on the Impact of Distributed Generation and Fault Impedance on Studies of Voltage Sags

“…Voltage sag is a reduction in rms value of source voltage, in one or more phases of the system, to values between 10% and 90% for periods of time between half cycle and 1 minute [3] and it characterized by its magnitude (the retained voltage), phase-angle jump, unbalance and duration [1]. There are many factors that influence voltage sags and some of them have received considerable attention from the researchers as, for example: the fault characteristics (location [4], type [4], impedance [5], [22] and fault Distribution [6]), pre-fault voltage [7], fault rate [8], protection system [9], reclosing system [9] and the system generation level [2], [23], Network topology [24].…”

A First Approach on the Impact of Distributed Generation and Fault Impedance on Studies on domain of frequency of Voltage Sags

“…Voltage sag is a reduction in rms value of source voltage, in one or more phases of the system, to values between 10% and 90% for periods of time between half cycle and 1 minute [3] and it characterized by its magnitude (the retained voltage), phase-angle jump, unbalance and duration [1]. There are many factors that influence voltage sags and some of them have received considerable attention from the researchers as, for example: the fault characteristics (location [4], type [4], impedance [5], [22] and fault Distribution [6]), pre-fault voltage [7], fault rate [8], protection system [9], reclosing system [9] and the system generation level [2], [23], Network topology [24].…”