Characteristics of Magnetic Field and Electromagnetic Torque for Half-Speed Steam Turbine Generator Under Negative-Sequence Conditions in Nuclear Power Generation
For a study on a generator running under different negative-sequence currents, a simulation model for various field distributions was developed for a 1266-MW half-speed steam turbine generator used for nuclear power generation. Following prescriptions from time-step finite-element electromagnetic
theory, a two-dimensional finite-element mathematical model is established. In numerical simulations of the generator at its rated running state, with 1%IN
through 5%IN
negative-sequence current, magnetic field distributions were calculated of the inside
of the generator. Based on comparisons and analysis of these magnetic fields, the influence of the negative-sequence component of the magnetic field distribution was investigated. Additionally, the underlying mechanism by which the negative-sequence component affects the electromagnetic torque
was uncovered in an application of the laws governing generator electromagnetic torque ripple. This could aid designing an operation and protection scheme for the generator.
Keywords: Electromagnetic Torque; Magnetic Field; Nuclear Power Generator; Turbo Generator
Document Type: Research Article
Affiliations: 1: School of Electrical Engineering and Automation, Harbin Institute of Technology, Harbin 150001, Heilongjiang Province, China 2: School of Electrical and Electronic Engineering, Harbin University of Science and Technology, Harbin 150080, Heilongjiang Province, China
Publication date: 01 May 2016
- Journal of Computational and Theoretical Nanoscience is an international peer-reviewed journal with a wide-ranging coverage, consolidates research activities in all aspects of computational and theoretical nanoscience into a single reference source. This journal offers scientists and engineers peer-reviewed research papers in all aspects of computational and theoretical nanoscience and nanotechnology in chemistry, physics, materials science, engineering and biology to publish original full papers and timely state-of-the-art reviews and short communications encompassing the fundamental and applied research.
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