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首页> 外文期刊>WSEAS Transactions on Power Systems >Modeling and Stability Analysis of AC-DC Power System with Controlled Rectifier and Constant Power Loads
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Modeling and Stability Analysis of AC-DC Power System with Controlled Rectifier and Constant Power Loads

机译：可控整流恒功率负载交直流电力系统建模与稳定性分析

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摘要

Power converters with their controls normally behave as a constant power load. This load can significantly degrade the system stability. Therefore, the system dynamic model is very importance because it can be used for stability analysis. It is well known that power converter models are time-varying because of their switching behaviours. This paper presents the DQ modeling method to eliminate the switching action to achieve time-invariant model for the stability analysis. The power system studied is the AC distribution system. The small-signal model of the power system is obtained by using a linearization technique. The small-signal simulations are used to validate the DQ linearized model. The reported model is then used for the stability analysis via the classical control theory. The results show that an excellent agreement between the mathematical model and the three-phase benchmark model is achieved.
机译：具有控制功能的功率转换器通常表现为恒定的功率负载。该负载会大大降低系统稳定性。因此，系统动态模型非常重要，因为它可以用于稳定性分析。众所周知，功率转换器模型因其切换行为而随时间变化。本文提出了一种DQ建模方法，该方法消除了切换动作，从而实现了时不变模型，用于稳定性分析。研究的电源系统是交流配电系统。电力系统的小信号模型是通过使用线性化技术获得的。小信号仿真用于验证DQ线性化模型。然后通过经典控制理论将报告的模型用于稳定性分析。结果表明，数学模型与三相基准模型之间取得了很好的一致性。

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