In order to effectively suppress surplus torque, realizing high precision loading, this paper applies proportional resonant (PR) control to the load torque control of electric load simulator (ELS), and analyzes and optimizes the stability and dynamic performance of ELS. The mathematical model of ELS is built in z-domain first in this paper, to establish foundation for designing and analyzing PR controller. The stability of the ELS with PR controller is analyzed through Nyquist diagrams, and optimized by reasonably designing the phase compensation angle of PR controller. The dynamic performance is analyzed through pole–zero plots, and the resonant gain of PR controller is designed based on the pole–zero plots to optimize the dynamic performance. Experimental results on ELS are provided, and the proposed method is compared with other typical methods, validating the effectiveness of the proposed method.

中文翻译：

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基于比例谐振控制的电力负荷模拟器负荷控制策略

为有效抑制剩余转矩，实现高精度加载，本文将比例谐振（PR）控制应用到电负载模拟器（ELS）的负载转矩控制中，对ELS的稳定性和动态性能进行分析和优化。本文首先在z域中建立ELS的数学模型，为PR控制器的设计和分析奠定基础。通过Nyquist图分析了带PR控制器的ELS的稳定性，并通过合理设计PR控制器的相位补偿角进行优化。通过零极点图分析动态性能，并基于零极点图设计PR控制器的谐振增益以优化动态性能。提供了 ELS 的实验结果，并将所提出的方法与其他典型方法进行了比较，