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Shifted frequency analysis-EMTP multirate simulation of power systems

机译：电力系统的移动频率分析 - EMTP多型模拟

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摘要

This paper presents a novel hybrid multirate protocol to interface a Shifted Frequency Analysis (SFA) simulator and an Electromagnetic Transients (EMT) simulator. The proposed protocol is based on the Multi-Area The ' venin Equivalent conceptual framework and uses a second parallel simulation of the EMT simulator to track the imaginary part of the complex-valued solution from the SFA simulator. Having a Real-Part EMT simulation and an Imaginary-Part EMT simulation, running in parallel, maintains the analyticity and synchronicity of the SFA/ EMT hybrid simulator and enables the use of large time steps in the SFA solution. This also allows the extraction of the fundamental frequency phasor of the EMT solution directly through the SFA transformation. The interfacing algorithm is demonstrated on the IEEE 39-bus system. The proposed protocol shows very good accuracy for capturing the electromechanical transients with the SFA simulator and an EMT-comparable accuracy with the EMT simulator. The results show the capability of the hybrid simulator to use significantly different solution steps in the SFA and EMT simulators, which results in considerable savings compared with an all-EMT solution. The proposed simulator would be very useful in conducting transient stability-type of studies when there is a need to model some devices with EMT accuracy.
机译：本文提出了一种新颖的混合多态协议，用于接口移位频率分析（SFA）模拟器和电磁瞬变（EMT）模拟器。所提出的协议基于“Venin等效概念框架的多区域”，并使用EMT模拟器的第二并行模拟，从SFA模拟器跟踪复值解决方案的虚部。具有实际部分EMT模拟和虚拟部分EMT模拟，并行运行，维护SFA / EMT混合模拟器的分析和同步性，并在SFA解决方案中使用大型时间步长。这还允许通过SFA转换直接提取EMT解决方案的基本频率量相。在IEEE 39总线系统上演示了接口算法。所提出的协议表示对使用SFA模拟器捕获机电瞬态的良好精度以及与EMT模拟器的EMT可比的精度。结果显示了混合模拟器在SFA和EMT模拟器中使用显着不同的解决方案步骤的能力，这导致与ALL-EMT解决方案相比的显着节省。当需要使用EMT精度模拟一些设备时，所提出的模拟器在进行瞬态稳定类型的研究方面非常有用。

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