Transformer iron core grounding current online monitoring device

Abstract

The invention discloses a transformer iron core grounding current online monitoring device. The transformer iron core grounding current online monitoring device comprises an iron core grounding element arranged on a transformer body, a transformer iron core grounding current sensor, a data processing module, a single-chip control module, a local area network wireless transmission module, a power supply module and an in-station monitoring device; the transformer iron core grounding current sensor is arranged on the iron core grounding element in a sleeving manner; the transformer iron core grounding current sensor, the data processing module, the single-chip machine control module, the local area network wireless transmission module and the in-station monitoring device are connected one byone; and the power supply module and the single-chip machine control module are connected to supply electric power to the whole device. By monitoring the current of the iron core grounding element, whether multiple points of the iron core of the transformer are grounded can be shown directly; and the transformer iron core grounding current online monitoring device has advantages of good real-timeperformance and high precision, can discover faults and hazards in time and accurately and can avoid waste of manpower and material resources caused by manual polling and safety hazards caused by poortimeliness.

Description

technical field [0001] The invention relates to the technical field of transformer on-line monitoring, in particular to an on-line monitoring device for transformer iron core grounding current. Background technique [0002] The power transformer is one of the important components of the power system, and its safe and stable operation is an important guarantee for the safety of the power system. When the transformer is in normal operation, its iron core and its metal clips must be reliably grounded at one point. Once the iron core / clip is grounded at two or more points, a circulating current will be generated inside the iron core / clamp, and the core / clamp grounding current will When the iron core / clamp is grounded at multiple points, the grounding current of the iron core / clamp will increase significantly, causing local overheating of the equipment, and in severe cases, it will even cause local burning of the iron core / clamp, making the grounding Chips are fused, resulting i...

AI Technical Summary

Problems solved by technology

This not only wastes manpower and material resources, but also fails to perform regular measurements for some unattended substations, leaving a safety hazard for the operation of electrical equipment in substations

Moreover, this method has many steps, complicated operation, and cannot be analyzed online. Under the interference of strong electromagnetic environment on site, there are problems in the accuracy and timeliness of detection.

[0004] Although with the continuous popularization and application of online monitoring technology in recent years, some domestic scientific research institutes and manufacturers have successively developed several online monitoring devices for transformer iron core grounding current, but these monitoring devices generally have single functions and require on-site measurement and installation. The method is unreasonable, the collected data is transmitted through cables, the construction volume is large, and the construction process will cause operational risks to the running transformers

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