Modelling Constant Power Loads: Accounting for Power Losses in Power Converters

IF 0.8 4区工程技术 Q4 ENGINEERING, ELECTRICAL & ELECTRONIC

Electronics Letters Pub Date : 2025-09-01 DOI:10.1049/ell2.70400

Mohammad Mohsen Rahimian, Hamid Reza Mohammadi, Saeed Golestan, Juan C. Vasquez

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引用次数: 0

Abstract

A constant power load (CPL) refers to an electrical load that maintains constant power consumption regardless of variations in the supply voltage. Many power electronics devices and converters exhibit such characteristics from the point of view of their DC link due to their control mechanisms and design configurations that aim to regulate output power despite changes in input voltage. This CPL characteristic is often modelled as a constant negative resistance. However, this modelling approach is inaccurate and may not represent the worst-case scenario because it neglects losses of power converters. In this paper, the effect of power losses in converters on the modelling of CPLs is studied, demonstrating that a lossy model of a power converter can present a more critical situation than a lossless one. The results of the mathematical study are verified using multi-domain offline and real-time simulations of a single buck converter with control characteristics of a CPL. In addition, to further show the aforementioned effect, a multi-converter system has been simulated which its results support the mathematical analysis.

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恒功率负荷建模：计算功率转换器中的功率损耗

恒定功率负载（CPL）是指无论电源电压变化如何，都能保持恒定功率消耗的负荷。从直流链路的角度来看，许多电力电子设备和转换器都表现出这样的特性，因为它们的控制机制和设计配置旨在调节输出功率，尽管输入电压发生变化。这种CPL特性通常被建模为恒定的负电阻。然而，这种建模方法是不准确的，可能不能代表最坏的情况，因为它忽略了电源转换器的损失。本文研究了变换器中功率损耗对cpl建模的影响，证明了功率变换器的有损耗模型比无损耗模型更能呈现出危急的情况。通过对具有cpll控制特性的单降压变换器进行多域离线和实时仿真，验证了数学研究的结果。此外，为了进一步证明上述效果，还对一个多变换器系统进行了仿真，其结果支持了数学分析。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Electronics Letters 工程技术-工程：电子与电气

CiteScore

2.70

自引率

0.00%

发文量

268

审稿时长

3.6 months

期刊介绍： Electronics Letters is an internationally renowned peer-reviewed rapid-communication journal that publishes short original research papers every two weeks. Its broad and interdisciplinary scope covers the latest developments in all electronic engineering related fields including communication, biomedical, optical and device technologies. Electronics Letters also provides further insight into some of the latest developments through special features and interviews. Scope As a journal at the forefront of its field, Electronics Letters publishes papers covering all themes of electronic and electrical engineering. The major themes of the journal are listed below. Antennas and Propagation Biomedical and Bioinspired Technologies, Signal Processing and Applications Control Engineering Electromagnetism: Theory, Materials and Devices Electronic Circuits and Systems Image, Video and Vision Processing and Applications Information, Computing and Communications Instrumentation and Measurement Microwave Technology Optical Communications Photonics and Opto-Electronics Power Electronics, Energy and Sustainability Radar, Sonar and Navigation Semiconductor Technology Signal Processing MIMO