【摘要】 各种短路故障时的过电压分析及其保护措施的确定是可控串补装置安全运行的必要保证。提出了特性参数分析法,利用电路的特性参数快速确定出严重过电压的故障点;对于严重过电压的故障点,又利用它分析确定了降低过电压过电流的晶闸管控制方法,并确定了过电压保护措施。用电磁暂态仿真程序PSCAD/EMTDC对严重故障点的过电压、过电流及其保护措施的效果进行了仿真。分析结果表明,特性参数法对短路故障的过电压水平的估计快速准确,采取了晶闸管控制和相应的保护措施后元件过电压、过电流水平及MOV能耗显著降低,有效地降低了过电压保护费用。更多还原

【Abstract】 The overvoltage analysis and confirmation of the protection measure for different short-circuit faults can ensure safe operation of thyristor controlled reactance series compensation device.A characteristics parameters analysis method is proposed.By use of characteristics parameters of circuit it can identify fault spots with serious overvoltage.In view of these fault spots,thyristor control method to reduce overvoltage and over-current is obtained.Furthermore the overvoltage protection measure of TCSCAC is presented.Electromagnetic transient program PSCAD/EMTDC is used to simulate overvoltage,as well as over-current and protection measure effect of serious fault spot.Analysis results show that the characteristics parameters method can quickly and accurately estimate the overvoltage level for short-circuit faults.After thyristor control and protection measure are adopted,the overvoltage level,over-current level and MOV energy consumption drop remarkably.Expenses of overvoltage protection are reduced greatly.更多还原