摘要
对系统出现的各种故障进行了深入分析。对于一般性故障,采用单端故障电流行波进行测距。对于系统发生故障时是在电压过零点或当初始电压的相位角在10°以下时,或者接于母线节点上的回路数少于三相,那么这时采集的行波信号很微弱,采用捕捉电流行波波头的方法很难判别故障地点。为此,文章创新地提出采用“主动行波法”(作为故障电流定位的补充),即用自己设计的装置向线路发射“特制”高频波,通过捕捉高频波反射的回波来判定故障发生的准确位置,从而使电力系统故障定位不受发生时刻和故障类型的限制。同时,开发了基于FPGA和SDARAM的100MHz的高速数据采集系统,解决了近区故障难以识别的问题。
The common faults can be located by fault currents of one end based on fault analysis. If fault happens on currents passing on zero-point or initial voltage phase under 10 or the number of circuits less than three, the acquisition signal of traveling wave is so weak that it can＇ t be accurately located by capturing the traveling wave crest. So the initiating traveling wave mode is proposed in location without limitation of fault time and fault kind. 100 MHz high speed data acquisition system is designed based on FPGA for identifying the fault nearby.
出处
《电力科学与工程》
2006年第1期50-53,共4页
Electric Power Science and Engineering
关键词
故障定位
主动行波法
高速数据采集系统
FPGA
fault location
initiating traveling wave mode
high speed data acquisition system
FPGA
