本指南包括评估电力公司应用的励磁控制系统动态性能的标准、定义和测试目标。术语励磁控制系统（见图1）用于区分同步电机、电力系统和励磁系统的综合性能与励磁系统的单独性能（参见IEEE Std 421.1（TM））。本指南的主要目的是为评估励磁控制系统（包括同步电机）在大信号和小信号干扰下的闭环性能提供依据。确认用于电力系统分析研究的励磁控制系统数学模型的充分性，确定励磁控制系统及其组件的测试目标，并编制励磁系统规范和附加标准（见IEEE Std 421）。 3（TM）、IEEE标准421.4（TM）和IEEE标准421.5（TM）。本指南的部分内容也将作为对熟悉励磁控制系统的人的教育材料。本指南适用于所有尺寸和类型的同步电机上使用的励磁系统，包括核电设施中的同步电机。 传统上，大信号性能（见4.2）与设备规范和验收测试更密切相关，而小信号性能（见4.3）与稳定性和模型研究更密切相关。然而，将实际干扰数据与模型模拟相匹配，需要在设计、规范和验收测试期间同时考虑大信号和小信号性能标准。

This guide includes criteria, definitions, and test objectives for evaluating the dynamic performance of excitation control systems as applied by electric utilities. The term excitation control system (see Figure 1) is used to distinguish the combined performance of the synchronous machine, power system, and excitation system from that of the excitation system alone (see IEEE Std 421.1(TM)). The primary purpose of this guide is to provide a basis for evaluating the closed-loop performance of excitation control systems, including synchronous machines, for both large and small signal disturbances. Confirming the adequacy of mathematical models for excitation control systems for use in analytical studies of power systems, identifying objectives for tests of excitation control systems and their components, and preparing excitation system specifications and additional standards will also be addressed (see IEEE Std 421.3(TM), IEEE Std 421.4(TM), and IEEE Std 421.5(TM),). Portions of this guide will also serve as educational material for people who are becoming familiar with excitation control systems. This guide is applicable to excitation systems used on all sizes and types of synchronous machines including those in nuclear power facilities. Traditionally, large signal performance (see 4.2) has been more closely associated with equipment specification and acceptance testing, while small signal performance (see 4.3) has been more closely associated with stability and model studies. Matching actual disturbance data with model simulations, however, requires that both large and small signal performance criteria be considered during design, specification, and acceptance testing.