相间功率控制器简化模型的适用性分析

针对相间功率控制器在限制短路电流方面的应用,描述了其原理结构,介绍了其2种简化模型———串联模型和电流源模型,并基于电流源模型研究了相间功率控制器限制短路电流的机理和影响此项技术应用的主要因素。结合IEEE 5节点系统将这2种模型与原始模型进行了对比仿真,以确定其在相间功率控制器限制短路电流应用研究中的作用。结果表明:电网中相间功率控制器限制短路电流的特性受到系统参数、负载情况和自身设备参数3个因素的影响;相间功率控制器的串联模型可用于系统的潮流计算和设备设计参数的合理性校核;相间功率控制器的电流源模型可用于系统的短路电流计算和机电暂态研究。

Applicability Analysis on Simplified Model of Interphase Power Controllers

According to the application that interphase power controllers(IPCs) limit short-circuit currents,its prototype structure is described.Furthermore,the series model and current source model of IPCs are presented.Based on the current source model of IPCs,the mechanism of short-circuit currents limitation and influence factors of application are demonstrated.Finally,the IEEE five nodes system with IPC is simulated for analyzing the functions of these two models in application research.Three conclusions are derived form the results.(1) The features of IPCs limiting short-circuit currents are influenced by the system parameters,load situation,and device parameters.(2) The series model of IPCs can be used to reasonableness examinations of equipment design parameters and the power flow calculations.(3) The current source model of IPCs can be applied to short-circuit current calculations and electromechanical transient researches.