VOLTAGE SAG EFFECTS ON SENSITIVE EQUIPMENT IN DISTRIBUTION NETWORKS ác giả Đinh Th nh i n i inh h Đ i h Đ n dtviet@ac udn vn n Đ i h h h Đ i h Đ n ; huuhieu019@yahoo com n Đ i h h n n h n gmail com óm[.]
VOLTAGE SAG EFFECTS ON SENSITIVE EQUIPMENT IN DISTRIBUTION NETWORKS ác giả: Đinh Th nh i n i inh h Đ ih Đ n dtviet@ac.udn.vn n Đ ih h h Đ ih Đ n ; huuhieu019@yahoo.com n Đ ih h n n h n gmail.com óm tắt: i u t g i i t m u t m u gu t uv t m t c E ect g etic sie t ct có t m g t i u g t e ti u c u g m u ó t i c gc g g v hó : Matlab/Simulink g i c uả gc má tải cảm t i t cc ả g má t g t g i ba pha, i má u gu t má có t t i u c t vi c m g g m mm g uá i t t g m (E ), t /Simu ink, … ct t i u só g i uá t m g g i c u g g g i EEE St g m u ác ct má t im tc ả g má ct m vi c c u i -DC-AC h n i n i i n h n h i h n i n năn ; Abstract: This paper suggests an approach for studying voltage sag effects on sensitive equipment in distribution networks Based on mathematical models that consist seven types of voltage sag in a three-phase power system, a module for the generator of a three-phase voltage sag is proposed This module can receive input from mathematical models or specific simulation software programmes such as EMTP, Matlab/Simulink, etc or signals from real wareforms in order to expand the simulation process The root mean square method based on the IEEE Std 1564-2014 standard is applied to the establishment of modules for characterizing voltage sags Then these modules are used to build up two models for analyzing voltage sag effects on the operation characteristics of an induction motor and an AC-DC-AC converter Key words: Voltage sag; Voltage quality; Distribution network; Power quality; Matlab/Simulink