Power line fault indicator with time synchronization function

Abstract

The invention discloses a power line fault indicator with a time synchronization function. The power line fault indicator comprises indicating units and a monitoring unit, wherein the monitoring unit is provided with a clock circuit; the indicating units are provided with real-time clock registers; the indicating units transmit acquisition time of measured data or an alarm event to the monitoring unit; the monitoring unit transmits data including current time of the monitoring unit back to the indicating units; the indicating units calculate information transmission time after reception of the data; and the transmission time plus the current time received from the monitoring unit makes current time of the indicating units in order to realize time synchronization between the indicating units and the monitoring unit. Through adoption of the power line fault indicator, data and alarm information of the indicating units and the monitoring unit of the fault indicator is synchronized; a data basis of fault judgement becomes more accurate; and a record of a fault occurrence moment becomes more accurate.

Description

technical field [0001] The present invention relates to a power line fault indicator. Background technique [0002] The power line fault indicator originated in Germany in the 1980s. It was invented to indicate the path of the short-circuit current of the power line and help people find the fault point. Since the 1990s, my country has introduced and learned the development technology of foreign short-circuit indicators. [0003] In the 21st century, people began to pay attention to the problem of remote signal transmission of short circuit indicators. After the short-circuit indicator acts, it first gives a local indication, and then sends an action signal through a high-voltage insulating medium such as wireless or optical fiber. The realization of signal remote transmission breaks through the sight barriers of overhead lines and cable equipment, prolongs people's observation distance, and gradually evolves into a distribution line fault location system. It is combined w...

AI Technical Summary

Problems solved by technology

The indicator unit collects data according to its own time, because each indicator unit is not synchronized, and the collected data of the three phases A, B, and C are not synchronized. Although these data can also be used to analyze grounding and short-circuit faults, they are not accurate enough. The data cannot be used as measurement monitoring

For example, electricity theft behavior monitoring can be compared with the load of each phase on the primary side and the load on the secondary side. The fault indicator can collect the load on the primary side, but because the data of each phase is not synchronized, it is also not synchronized with the data of the energy meter, so it cannot be done. Compared

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