| 摘要 |
A fault point location system comprises substation 1 installed along transmission and distribution line (TD line) to send the surge detection time (SD time), and the master station 2 locates fault points under the information. Substation 1 stores and updates the past voltage or current waveforms of said line, stores the surge recognition level L2 (higher than the noise level), and the surge waveform starting level L1 (sets lower than said level L2), determines as the SD time, in the case where the voltage or current of said TD line exceeds said level L2, the time at which said voltage or current first exceeded said level L1 after going back through said waveforms stored from the time at which said surge recognition level was exceeded, and sends said SD time to said master station 2 via the communication network. <IMAGE> |
