摘要
给出了一种用于配电网接地故障点定位的具备编码的S注入法。在注入电流信号中加入调制和编码使同频电磁干扰大大削弱,通过对注入信号的载频进行适当的选择及采用相关算法,异频干扰和随机干扰的影响也得到有效抑制。实测表明编码S注入法在复杂电磁干扰存在的环境中可正常工作。可有效提高接地故障点定位的可靠性。
An encoded S - injection method for locating ground fault in the distribution network is presented in this paper. The injected current signal is modulated and encoded to weaken the electromagnetic interference of the same frequency to a great extent. Influence of differential - frequency interference and random disturbance is also suppressed effectively through proper selection of the carrier of the injected signal and adoption of a suitable algorithm. Actual measurement shows that the encoded S - injection method can work well in an environment where the complicated electromagnetic interference exists. This approach can increase the reliability of location of grounding fault.
出处
《电气自动化》
2014年第6期61-63,共3页
Electrical Automation
关键词
接地故障
定位
编码
S注入法
干扰
grounding fauh
location
encoding
S injection method
interference
