高压直流换流阀关键元器件宽频等效模型及应用
发布时间：2019-02-23 13:26
【摘要】：换流阀作为高压直流输电系统中的关键设备,在运行中要承受不同形式的过电压(操作、陡波、雷电等过电压),换流阀内关键元件高频参数及分散性问题会导致阀内电压分布不均匀。此外换流阀的周期性导通和关断过程会产生宽频电磁骚扰,这会对换流站内的通信设备及控制系统产生影响。建立换流阀宽频等效电路是对换流阀内过电压分析及电磁干扰预测的基础。 本文在基本宽频模型的基础上提出了适合换流阀内关键设备及元件高电压大电流特点的宽频模型,分析总结设备及元件不同物理结构的宽频特性,利用宽频特性曲线预估模型参数。对应用于高压直流换流模块实验平台的关键元件进行宽频测试,对比集成宽频模型的仿真结果与测试曲线,验证建模方法的有效性。通过上述建模方法,本文结合了国网智研院课题“±10kV压接型IGBT换流阀多物理场研究”,重点研究了换流阀系统的宽频等效模型,并基于换流阀的宽频等效电路模型,研究了换流阀系统的过电压分布特性及其影响因素。并结合换流阀过电压的分布规律,从寄生参数方面简要探讨了过电压分布的均衡措施,具有一定的参考价值。
[Abstract]:As the key equipment in HVDC transmission system, converter valve has to bear different forms of overvoltage (operation, steep wave, lightning and so on). The high frequency parameters and dispersion of the key components in the converter valve will lead to the uneven distribution of the voltage in the valve. In addition, the periodic conduction and turn-off process of the converter valve will produce wide-band electromagnetic disturbance, which will affect the communication equipment and control system in the converter station. It is the foundation of the analysis of overvoltage and the prediction of electromagnetic interference to establish the broadband equivalent circuit of converter valve. Based on the basic broadband model, this paper presents a broadband model suitable for the characteristics of high voltage, high current and high voltage in the key equipment and components in the converter valve, and analyzes and summarizes the broadband characteristics of the equipment and the different physical structures of the components. The model parameters are estimated by broadband characteristic curve. The key components used in HVDC converter module are tested. The simulation results and test curves of the integrated broadband model are compared to verify the effectiveness of the modeling method. Through the above modeling methods, this paper combines the research project of "卤10kV Pressure-Connected IGBT Converter Valve Multi-physical Field", and focuses on the broadband equivalent model of the commutation valve system, and based on the broadband equivalent circuit model of the commutation valve. The overvoltage distribution characteristics of converter valve system and its influencing factors are studied. Combined with the law of overvoltage distribution of converter valve, the equalization measures of overvoltage distribution from parasitic parameters are briefly discussed, which has certain reference value.
【学位授予单位】：华北电力大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TM721.1
本文编号：2428875
[Abstract]:As the key equipment in HVDC transmission system, converter valve has to bear different forms of overvoltage (operation, steep wave, lightning and so on). The high frequency parameters and dispersion of the key components in the converter valve will lead to the uneven distribution of the voltage in the valve. In addition, the periodic conduction and turn-off process of the converter valve will produce wide-band electromagnetic disturbance, which will affect the communication equipment and control system in the converter station. It is the foundation of the analysis of overvoltage and the prediction of electromagnetic interference to establish the broadband equivalent circuit of converter valve. Based on the basic broadband model, this paper presents a broadband model suitable for the characteristics of high voltage, high current and high voltage in the key equipment and components in the converter valve, and analyzes and summarizes the broadband characteristics of the equipment and the different physical structures of the components. The model parameters are estimated by broadband characteristic curve. The key components used in HVDC converter module are tested. The simulation results and test curves of the integrated broadband model are compared to verify the effectiveness of the modeling method. Through the above modeling methods, this paper combines the research project of "卤10kV Pressure-Connected IGBT Converter Valve Multi-physical Field", and focuses on the broadband equivalent model of the commutation valve system, and based on the broadband equivalent circuit model of the commutation valve. The overvoltage distribution characteristics of converter valve system and its influencing factors are studied. Combined with the law of overvoltage distribution of converter valve, the equalization measures of overvoltage distribution from parasitic parameters are briefly discussed, which has certain reference value.
【学位授予单位】：华北电力大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TM721.1
【参考文献】
相关期刊论文 前2条
1 蓝元良;汤广福;印永华;周孝信;;串联晶闸管反向恢复暂态过程的研究[J];电网技术;2006年16期
2 张重远;杨彬;赵秀生;毛冠民;刘松喜;;一种VFTO作用下变压器绕组的高频无源电路模型[J];华北电力大学学报(自然科学版);2010年05期
，本文编号：2428875
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