Space Phasor Geometrical Loci in Polar Coordinates as Voltage Unbalance Monitoring Tool

被引：0

作者：

Craciunescu, Aurelian ^{[1
]}

Ciumbulea, Gloria Stefania ^{[1
]}

Dumitrica, Catalina Necula ^{[2
]}

机构：

[1] Univ Politehn Din Bucuresti, Bucharest, Romania

[2] Valahia Univ Targoviste, Targoviste, Romania

来源：

2013 8TH INTERNATIONAL SYMPOSIUM ON ADVANCED TOPICS IN ELECTRICAL ENGINEERING (ATEE) | 2013年

关键词：

power quality; voltage unbalance monitoring; voltage space phasor; geometrical loci; INDUCTION-MOTORS; PERFORMANCE; OPERATION;

D O I：

10.1109/ATEE.2013.6563378

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

Voltage unbalance is a common phenomenon in AC power network. This disturbance can cause on the three-phase induction motors connected to the power supply system serious ill effects such as overheating, drop of efficiency and reduction in output torque. Therefore, operation of an induction motor for any length of time above 5% of voltage-unbalance condition is not recommended and on-line voltage unbalance monitoring is required from economical reasons. In this paper a new method of evaluating the degree of unbalanced voltage in power network is proposed. This new approach uses voltage space phasor geometrical locus in polar coordinates based on a modified "a-b-c" to "d-q" coordinate transformation which gives the possibility to localize the unbalanced phases and to appreciate the severity of the voltage unbalance.

引用

页数：4