Details
| Original language | English |
|---|---|
| Title of host publication | 2017 IEEE International Electric Machines and Drives Conference, IEMDC 2017 |
| Publisher | Institute of Electrical and Electronics Engineers Inc. |
| ISBN (electronic) | 9781509042814 |
| Publication status | Published - 3 Aug 2017 |
| Event | 2017 IEEE International Electric Machines and Drives Conference, IEMDC 2017 - Miami, United States Duration: 21 May 2017 → 24 May 2017 |
Abstract
This paper offers a new method to analyze the performance of three-phase synchronous machines operating with an unsymmetrical stator winding due to cut-out and bypassed coils. The resulting unsymmetrical current distribution in the stator winding tends to produce overheating of parts of the winding at full load and torque pulsations. Thus, the main objective of this study is to determine the maximal load, under which the unsymmetrical machine may operate without exceeding the permissible temperature limit. In this paper, based on the multi-loop method, the steady-state expression for each loop current is obtained by analyzing the steady-state characteristics of the stator and the rotor currents in case of missing stator coils. Thus, the system of differential equations in steady-state is reduced to a system of algebraic equations which can be solved by using the Gaussian elimination method. In order to evaluate the steady-state simulations, experiments with a bypassed stator coil were carried out on a 41 MW synchronous machine with two poles. Both the circulating current within parallel branches and the line currents as a result of coil cut-outs were analyzed.
Keywords
- bypassed coils, circulating current, cut-out coils, multi-loop method, synchronous machine, unbalanced winding, winding fault
ASJC Scopus subject areas
- Energy(all)
- Energy Engineering and Power Technology
- Engineering(all)
- Electrical and Electronic Engineering
- Engineering(all)
- Mechanical Engineering
Cite this
- Standard
- Harvard
- Apa
- Vancouver
- BibTeX
- RIS
2017 IEEE International Electric Machines and Drives Conference, IEMDC 2017. Institute of Electrical and Electronics Engineers Inc., 2017. 8002032.
Research output: Chapter in book/report/conference proceeding › Conference contribution › Research › peer review
}
TY - GEN
T1 - Performance analysis of synchronous machines after disconnecting stator coils part II
T2 - 2017 IEEE International Electric Machines and Drives Conference, IEMDC 2017
AU - Misir, Onur
AU - Brand, Jennifer
AU - Ponick, Bernd
N1 - Publisher Copyright: © 2017 IEEE. Copyright: Copyright 2017 Elsevier B.V., All rights reserved.
PY - 2017/8/3
Y1 - 2017/8/3
N2 - This paper offers a new method to analyze the performance of three-phase synchronous machines operating with an unsymmetrical stator winding due to cut-out and bypassed coils. The resulting unsymmetrical current distribution in the stator winding tends to produce overheating of parts of the winding at full load and torque pulsations. Thus, the main objective of this study is to determine the maximal load, under which the unsymmetrical machine may operate without exceeding the permissible temperature limit. In this paper, based on the multi-loop method, the steady-state expression for each loop current is obtained by analyzing the steady-state characteristics of the stator and the rotor currents in case of missing stator coils. Thus, the system of differential equations in steady-state is reduced to a system of algebraic equations which can be solved by using the Gaussian elimination method. In order to evaluate the steady-state simulations, experiments with a bypassed stator coil were carried out on a 41 MW synchronous machine with two poles. Both the circulating current within parallel branches and the line currents as a result of coil cut-outs were analyzed.
AB - This paper offers a new method to analyze the performance of three-phase synchronous machines operating with an unsymmetrical stator winding due to cut-out and bypassed coils. The resulting unsymmetrical current distribution in the stator winding tends to produce overheating of parts of the winding at full load and torque pulsations. Thus, the main objective of this study is to determine the maximal load, under which the unsymmetrical machine may operate without exceeding the permissible temperature limit. In this paper, based on the multi-loop method, the steady-state expression for each loop current is obtained by analyzing the steady-state characteristics of the stator and the rotor currents in case of missing stator coils. Thus, the system of differential equations in steady-state is reduced to a system of algebraic equations which can be solved by using the Gaussian elimination method. In order to evaluate the steady-state simulations, experiments with a bypassed stator coil were carried out on a 41 MW synchronous machine with two poles. Both the circulating current within parallel branches and the line currents as a result of coil cut-outs were analyzed.
KW - bypassed coils
KW - circulating current
KW - cut-out coils
KW - multi-loop method
KW - synchronous machine
KW - unbalanced winding
KW - winding fault
UR - http://www.scopus.com/inward/record.url?scp=85030320097&partnerID=8YFLogxK
U2 - 10.1109/iemdc.2017.8002032
DO - 10.1109/iemdc.2017.8002032
M3 - Conference contribution
AN - SCOPUS:85030320097
BT - 2017 IEEE International Electric Machines and Drives Conference, IEMDC 2017
PB - Institute of Electrical and Electronics Engineers Inc.
Y2 - 21 May 2017 through 24 May 2017
ER -