Abstract

IEC 61000-4-30 has recently defined a method for detection and analysis of rapid voltage changes in power system networks. This paper presents some of the results obtained in the application of the IEC standard method in different low-voltage and medium-voltage power system networks with different load types and some of the limitations found in the standard method for the correct detection and characterization of these voltage events.

Highlights

  • IEC 61000-4-30, Ed. 3, 2015 [1] defines a rapid voltage change “as a quick transition in r.m.s. voltage occurring between two steady-state conditions, and during which the r.m.s. voltage does not exceed the dip/swell thresholds.”

  • For this purpose, the standard defines that an r.m.s. voltage is in a steady-state condition “if all the immediately preceding 100/120 Urms(1/2) values remain within an RVC threshold from the arithmetic mean of those 100/120 Urms(1/2) values”

  • The purpose of this paper is to report our experience in the application of the IEC standard method in the measurement of RVC events in different low and medium voltage power system networks and to point out some of the limitations of the standard method in the detection and the characterization of these events

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Summary

INTRODUCTION

IEC 61000-4-30, Ed. 3, 2015 [1] defines a rapid voltage change “as a quick transition in r.m.s. voltage occurring between two steady-state conditions, and during which the r.m.s. voltage does not exceed the dip/swell thresholds.” The standard defines the Urms(1/2) magnitude (the r.m.s. voltage computed over one cycle and refreshed each half-cycle) as the basic calculation for the measurement and detection of RVC events. The standard defines the Urms(1/2) magnitude (the r.m.s. voltage computed over one cycle and refreshed each half-cycle) as the basic calculation for the measurement and detection of RVC events. In this standard the detection and characterization of RVC events is based on the identification of two consecutive steady states. The purpose of this paper is to report our experience in the application of the IEC standard method in the measurement of RVC events in different low and medium voltage power system networks and to point out some of the limitations of the standard method in the detection and the characterization of these events.

DETECTION AND EVALUATION OF RVC EVENTS
EFFECT OF THE DETECTION THRESHOLD IN THE
TIME AGGREGATION OF RVC EVENTS
Findings
CONCLUSION
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