Title :
Fault detection and isolation of two DC-DC converters parallel operation with single CT
Author :
Jung, Min-Jae ; Park, Sang-Eun ; Oh, Sung-up ; Lee, Hak-Ju ; Se-Jin Seong
Author_Institution :
Dept. of Electr. Eng., Chungnam Nat. Univ., Taejon, South Korea
Abstract :
Power converter parallel operation is used for large capacity and fault tolerant power supply systems. The converter parallel operation requires completely automatic load current sharing, a simple feedback controller, high reliability and easy maintenance. In this paper, to share load current equally with two identical converters, load current error feedback is carried out at the two converters respectively, which have a single current transformer (CT). It is called the zero current transformer (ZCT) method. This paper presents fault detection when one converter is broken. To supply power to the load stably, the faulted converter is detected and isolated. The authors suggest a solution by simulation and experiment
Keywords :
DC-DC power convertors; circuit feedback; circuit reliability; current transformers; fault location; power supplies to apparatus; power transformers; DC-DC power converters; automatic load current sharing; fault detection; fault isolation; feedback controller; load current error feedback; maintenance; reliability; zero current transformer method; Circuit faults; Current measurement; Current transformers; DC-DC power converters; Electrical fault detection; Equivalent circuits; Fault detection; Power supplies; Power system reliability; Voltage;
Conference_Titel :
Industrial Electronics, 2001. Proceedings. ISIE 2001. IEEE International Symposium on
Conference_Location :
Pusan
Print_ISBN :
0-7803-7090-2
DOI :
10.1109/ISIE.2001.931622
