Multi-pulse Converters and Passive Filtering to Improve Power Harmonics in an Integrated Power System
Abstract
The United States Navy is considering new power distribution architectures for surface combatants to enhance war-fighting capabilities and ship design opportunities. One such concept is the Integrated Power System (IPS) in which a common electric bus delivers power to both the ship's propulsion system and ship service electric system. One of the main challenges to the IPS/all-electric ship is the introduction of significant harmonic distortion into the main AC distribution bus caused by power electronic equipment. Power electronic equipment is necessary to implement the variable-speed motor drive for propulsion and for power conversion associated with distribution. The harmonic distortion leads to derating distribution equipment and degrading the performance of various system loads. As a result, every system attached to the main distribution bus must be able to accommodate the harmonics or the harmonics must be reduced to acceptable levels. The project's objective is to compare competing strategies that seek to reduce bus harmonics in a naval warship IPS. The subsidiary benefit of this task is to improve the efficiency and minimize the derating factor for shipboard engines, generators, and transformers. The proposed method of reducing harmonics is a system based on multi-pulse rectifiers and passive filtering. A multipulse rectifier is a power electronic device that converts AC power into DC power. Six and twelve-pulse rectifier systems are simulated and evaluated, as well as constructed and tested in the laboratory paradigm for passive filtering is set forth for each system. Size, weight, and acquisition cost estimates are derived from vendor data and assessed for feasibility of implementation on an actual destroyer-class warship. This project demonstrates the feasibility of improving power harmonics in an IPS using a system of multi-pulse converters and filtering.
Document Details
- Document Type
- Technical Report
- Publication Date
- May 07, 2007
- Accession Number
- ADA473260
Entities
People
- Daniel C. Ku
Organizations
- United States Naval Academy