A Distributed Wave Recording System Integrated with Small Current Grounding Line Selection Function

Abstract

The invention relates to a distributed wave recording system integrating a low-current grounding line selection function. The collection terminal includes: a transformer for collecting analog signals, a first optocoupler circuit for collecting switch signals, a first B code interface for collecting electrical B code signals, and a first power supply module; the SFP interface is connected to the management machine , the first relay is connected with a first alarm; the management machine includes: a light receiving module that receives signals collected by the collection terminal, a second optocoupler circuit that collects switching signals, and a second B code that collects photoelectric B codes. A code interface, a second AD conversion chip, and a second power supply module; the CPU module is also connected with a COME industrial control module, and the COME industrial control module is connected to the display screen.

Description

technical field [0001] The invention belongs to the technical field of power system monitoring, and in particular relates to a distributed wave recording system integrating a low-current grounding line selection function. Background technique [0002] At present, the 110KV substation is rarely equipped with a wave recorder. Even if it is installed, it only collects the voltage and current of the high-voltage side (110kV), and there is no independent wave recorder for the 10kV outlet. The 10kV outgoing line protection has recording, but the sampling frequency is low, the recording time is short, and only the data of one line that has failed can be recorded, while other non-faulty lines and the currents of the three sides of the transformer cannot be recorded at the same time, which is not conducive to detailed fault analysis. [0003] The prior art discloses a wave recording system in which the acquisition unit relies on GPS time synchronization. Although the wave recording s...

AI Technical Summary

Problems solved by technology

The 10kV outgoing line protection has wave recording, but the sampling frequency is low, the recording time is short, and only the data of one faulty line can be recorded, while other non-faulty lines and the current on three sides of the transformer cannot be recorded at the same time, which is not conducive to detailed fault analysis

[0003] In the prior art, a wave recording system is disclosed in which the acquisition unit relies on GPS time synchronization. Although the wave recording system separates acquisition and wave recording, its acquisition unit relies on GPS synchronization and each interval still needs an acquisition unit and an analysis unit. , did not really realize distributed wave recording. Another existing technology discloses a distributed synchronous wave recording system. Each acquisition terminal can only collect analog quantities, but cannot collect switching quantities. It has a single function and only has wave recording functions. With small current grounding line selection function

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