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.
关键词
可控电网换相换流器/电磁暂态/等效建模/简化模型
Key words
controllable line commutated converter(CLCC)/electromagnetic transients(EMT)/equivalent modeling/simplified model
维普
万方数据