求翻译：本文结合大量的文献资料，阐述了同步发电机励磁控制系统的组成、主要任务以及发展状况；介绍了同步发电机励磁控制系统的要求，并提出了本文的主要研究内容：是什么意思？

In this paper, a large number of literature data on the composition of the synchronous generator excitation control system, the main task, as well as the development of; a synchronous generator excitation control system requirements, and the main contents of this article:

This combined a large amount of literature on the alternator field synchronization control system of the composition, the main task, as well as development of synchronization; describes the alternator field control system requirements, and to propose a major study of this document:

This article unifies the massive literature material, elaborated the synchronous generator excitation control system composition, the primary mission as well as the development condition; Introduced the synchronous generator excitation control system request, and proposed this article main research

This combined with a large amount of literature describing synchronous generator excitation control system composition, main tasks and development status of introduces requirements for synchronous generator excitation control system, and the main content of this article:

压敏电阻