Wireless phasor collector for secondary power taking of voltage transformer

Abstract

The invention relates to a wireless phasor collector for secondary power taking of a voltage transformer. The collector comprises a current collecting unit, an A/D conversion unit, a wireless transmitter, a voltage collecting unit, a power switching unit, an AC/DC rectifier module and a storage battery. According to the wireless phasor collector, the battery is used for power supplying and the secondary side voltage of the voltage transformer is also used for providing power, thereby realizing synchronization of the measurement of the collector and the power supply. When the collector batteryhas sufficient power, the battery is used for providing power; and when the collector battery is out of power, the secondary measurement voltage of the voltage transformer is used for taking power forpower supply. Meanwhile, with the 2.4G wireless transmission technology, a problem of short transmission distance is solved. Because of combination of the battery-based power supply with power supplybased on the secondary power taking of the voltage transformer as well as the wireless transmission technology, the power supply reliability and application range of the phasor collector are greatlyimproved and reliable protection and convenience are provided for phasor measurement by the relay protection personnel with load.

Description

technical field [0001] The invention relates to the technical field of relay protection, in particular to a wireless phasor collector for secondary energy acquisition of a voltage transformer. Background technique [0002] At present, the commonly used phasor collectors are powered by batteries or mains. If the battery is out of power or there is no socket connected to the mains during use, the collector will not be able to use the collector for measurement normally, which will affect the continued operation. Measurement of phasors by electrical protection personnel. At the same time, the current phasor collectors all use wires to transmit data, and the transmission distance is short, so the application range is small. [0003] The disadvantages of the prior art are as follows: [0004] (1) The battery life is short. The phasor collector used is powered by batteries. During the long-term phasor test of the substation, the battery may be out of power or low in use and cann...

AI Technical Summary

Problems solved by technology

The phasor collector used is powered by batteries. During the long-term phasor test of the substation, the battery may be out of power or the power is low during use and the measurement cannot be performed, which will affect the measurement of the phasor by the relay protection personnel.

[0005] (2) The measuring range is small

Due to the influence of the length of the test line, the general measurement distance is less than 2 meters, and it will not be applicable to vector tests across intervals or long distances

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