简介:摘要研究目的在目前STATCOM的保护系统中,STATCOM的连接电抗器本身不配置相关保护,但设备的实际运行环境难以预估,且由于连接电抗器处于STATCOM阀组柜体与开关之间,占地面积大,相隔间距小,发生短路故障的概率较高。因此,本文结合STATCOM及其相关配套设备的保护情况,通过RTDS试验平台,模拟连接电抗器的不同短路故障情况,分析试验结果中的数据及现象,为STATCOM的安全稳定运行提出有效建议。研究方法采用实时数字仿真仪(RTDS)进行模拟分析。通过模拟4种较为典型的STATCOM连接电抗器短路故障,记录STATCOM的运行波形数值及保护动作结果,分析STATCOM装置发生连接电抗器故障时的影响及后果。研究结果通过比较分析4种不同的连接电抗器故障,故障一、二对设备影响及系统影响较大,故障发生时,均导致STATCOM装置进入暂态状态,且造成设备跳闸,故障三及故障四对设备及系统基本无影响。结论在目前STATCOM的保护配置下,因连接电抗器不配备专门保护,若连接电抗器若发生短路故障时,属于保护盲区,需要靠其他保护来隔离故障,因此,在STATCOM的前期规划设计及实际的运行维护中,需要关注到连接电抗器的短路故障,采取措施减少连接电抗器的故障发生,避免发生严重后果,提高设备运行可靠性。
简介:摘要:分析小电流接地系统单相接地故障时的故障特性,借助RTDS仿真系统模拟故障时系统的电压电流动态特性,搭建测试小电流接地选线装置的闭环测试系统。
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