Simplified Modeling Method for Controllable Line-commutated Converters in Electromagnetic Transients Simulation
This paper presents a simplified modeling method for controllable line-commutated converters(CLCC)in electromagnetic transients(EMT)simulation.The CLCC combines fully controllable and semi-controllable devices and actively interrupts arm current during AC faults to prevent commutation failure.However,the detailed CLCC model,constructed using discrete components,must improve its efficiency in EMT simulations.A simplified modeling method is proposed to address this issue.The method is based on the switch logic and arm current conduction path of CLCC,simplifying the CLCC arm to include only one IGBT switch and one surge arrester,thereby reducing the simulation scale.Simulation results demonstrate that the simplified model achieves a significant 10-fold speedup compared to the detailed model while maintaining high accuracy.This notable enhancement greatly improves the efficiency of simulation research.Furthermore,the analysis confirms that the proposed simplified model retains the external characteristics of the arm,making it suitable for harmonic analysis,controller strategy verification,and research on external faults of the CLCC arm.
controllable line commutated converter(CLCC)electromagnetic transients(EMT)equivalent modelingsimplified model
万方数据
维普
