Brushless phase-compounding synchronous generators are widely used in extremely harsh conditions such as ships, islands, and remote mountainous areas. In response to the design requirements of the phase-compounding excitation system, a method of excitation that combines over-compensation of generator regulation characteristics with shunt resistance is proposed. This method allows the generator to rely solely on residual magnetism and phase-shifting reactance for stable excitation and voltage stabilization under no-load conditions, and still achieve stable armature voltage through closed-loop automatic voltage regulation under full-load conditions, with strong anti-interference capabilities.

This paper mainly includes the following three parts: first, an introduction to the working principle of the brushless compound-wound excitation generator is provided, then the expression of the excitation current is derived, and based on this, the core parameters of the excitation system such as transformers and phase-shifting reactance are analyzed and designed. Finally, simulations and experiments are conducted on the Simulink platform and a 20kW prototype, verifying the effectiveness and feasibility of the proposed excitation method and design scheme.

The parameter design method proposed in this paper is highly accurate and is feasible and effective for both brushed and brushless excitation systems, offering strong practical value.

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http://www.motor-abc.cn/djykzyy/article/abstract/20240901

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Ding Jie is a master's candidate in the School of Electrical Engineering at Southeast University, with a research direction in power electronics and electrical drives. Email:1075846619@qq.com

Yang Guorun, Ph.D., associate researcher, mainly engages in the research of AC/DC power conversion, virtual synchronous generator control, and energy storage access technology. Email: Thomasyang23@nue.edu.cn