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中文摘要：
针对诊断直流输电系统核心部件的换流阀晶闸管阀误开通、不开通等故障,为了使系统快速的从阀故障中恢复正常运行,减少阀故障对系统的影响,首先对阀故障恢复特性及故障期间系统控制方式进行了分析研究,其次在CIGRE HVDC标准模型的基础上提出了一种改进的脉冲触发装置,保证了阀故障时脉冲等间隔的触发,可有效避免阀故障的发生。通过对阀故障的仿真发现,故障稳态期间,通过与CIGRE HVDC标准模型的触发脉冲波形对比,所改进的模型完全能满足高压直流输电系统极控制层对等间隔触发脉冲的要求,并且可以有效降低换相失败的发生几率以及使系统从故障中快速恢复正常运行。
英文摘要：
This paper analyzes and studies the valve fault recovery characteristics and control method for HVDC system during the system fault, puts forward an improved pulse trigger device based on CIGRE HVDC bergeron model to ensure the valve pulse intervals trigger during system fault, which can avoid the occurrence of valve fault effectively. In the fault steady-state period, compared with the CIGRE HVDC bergeron model triggering pulse waveform, through the simulation of the valve fault, it is shown that the improved model can completely satisfy the equal interval trigger pulse requirements of pole control layer of HVDC transmission system, can effectively reduce the occurrence of commutation failure and make the system restore normal operation from failure.
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