The integrated power system (IPS) with pulse load involves the dynamic processes of millisecond‐level switching period and second‐level pulse period. The characteristics of this kind of multicycle dynamic process cause much difficulty in analyzing system stability. For this reason, this paper presents a multicycle coupling mathematical model of the IPS with pulse load and proposes an algorithm based on the state variables for analyzing the sensitivity of the preceding switching period which can rapidly and accurately calculate the periodic orbit and stability margin of the system. Considering a little change in the system state variables under small disturbance, this paper uses the pulse‐period average model to simplify the calculation. The simulation analysis shows that the pulse‐period average model has the same stability margin with the multicycle coupling model. The critical pulse power calculated by the above models is 5.5 and 17 kW when the constant power is 20 and 14 kW respectively, which is consistent with the time domain simulation. It may provide technical support for the stability analysis of the IPS with pulse load. © 2021 Institute of Electrical Engineers of Japan. Published by Wiley Periodicals LLC.

中文翻译：

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多周期动态过程中集成电力系统的稳定性分析

具有脉冲负载的集成电源系统（IPS）涉及毫秒级开关周期和二级脉冲周期的动态过程。这种多周期动态过程的特性给分析系统稳定性带来很大困难。因此，本文提出了具有脉冲负载的IPS的多周期耦合数学模型，并提出了一种基于状态变量的算法，用于分析前一个开关周期的灵敏度，可以快速准确地计算出其周期轨道和稳定裕度。系统。考虑到在小扰动下系统状态变量的微小变化，本文使用脉冲周期平均模型来简化计算。仿真分析表明，脉冲周期平均模型与多周期耦合模型具有相同的稳定性裕度。当恒定功率为20和14 kW时，由上述模型计算出的临界脉冲功率分别为5.5和17 kW，这与时域仿真是一致的。它可以为带脉冲负载的IPS的稳定性分析提供技术支持。©2021日本电气工程师学会。由Wiley Periodicals LLC发布。