Signal injection adjustment device and signal injection device

Abstract

The invention discloses a signal injection regulating device, which comprises: a signal detection unit connected to the connection between the signal injector and the power line, used to detect the current signal injected into the power line by the signal injector, and Feedback the detected current signal; the signal adjustment unit is used to receive the feedback current signal, determine the error between the feedback current signal and the pre-configured expected current signal, and adjust the current signal to be injected by the signal injector according to the error, The actual current signal that the signal injector injects into the power line is caused to match the expected current signal. The present invention detects the actual injected signal in real time, and adjusts the signal to be injected according to the error between the actual injected signal and the expected signal, so that the error between the fault detection result and the actual fault situation is reduced It is small, which effectively improves the detection accuracy and ensures the reliability of the detection results.

Description

technical field [0001] The present invention relates to the field of power systems, in particular to a signal injection regulating device and a signal injection device. Background technique [0002] At present, the configuration of distribution lines mostly adopts the method of not grounding the neutral point or grounding through the arc suppression coil, and when a single-phase ground fault occurs in the distribution line of this configuration, the fault point only flows through the capacitive current of the system , the current is small and does not affect the operation of the system, but it will cause the voltage of the ungrounded phase to rise, threatening the safety of the line insulating porcelain bottle, and once the insulating porcelain bottle breaks down, it will cause a short circuit between the two phases and cause the circuit breaker to trip. For this reason, some products or methods for finding the location of the single-phase ground fault have come out one afte...

AI Technical Summary

Problems solved by technology

[0005] Aiming at the problem in the related art that there is a certain error between the actual signal injected into the power distribution line through the signal injection direction and the signal injected in advance, so that the later fault detection and location are not accurate enough, the present invention proposes a signal injection adjustment device And the signal injection device, which can detect the actual signal injected into the distribution line in real time, and compensate the signal to be injected according to the error between the detected actual signal and the expected signal, so that the actually injected signal is consistent with the expected signal

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