Transformer neutral point DC bias magnetic monitoring system

The online monitoring of transformer neutral point DC bias can monitor the noise and vibration of transformer neutral point AC/DC, transformer body in real time, thereby achieving real-time monitoring of the operation status of transformer equipment; At the same time, by analyzing monitoring data, potential faults in transformers can be detected in a timely manner and important data basis can be provided for condition based maintenance. Once the neutral point DC or transformer body vibration exceeds the standard, operators can take timely measures to prevent major accidents in transformers and systems, providing a strong and reliable guarantee for the safe, reliable, stable, and economical operation of the power system.

System Composition

The transformer neutral point DC bias online monitoring system mainly consists of current sensors, vibration sensors, noise sensors, neutral point DC bias monitoring devices, monitoring IEDs, etc; The monitoring device collects data from front-end sensors, uploads it to the monitoring IED through RS485, and then uploads it to the station monitoring system through 61850.

Features

◎Real time monitoring of neutral point AC and DC data of transformers, as well as noise and vibration data of the transformer body;

◎Adopting a through type high-precision transformer with high measurement accuracy;

◎Easy and convenient installation, can be installed with power on, and does not require the main equipment to be powered off for installation;

◎Capable of automatic acquisition of state parameters, signal conditioning, analog-to-digital conversion, data preprocessing, and transmission to upper level units;

◎Supports multiple communication methods such as RS485 and 61850;

◎Parameters are digitized and cached on-site, and monitoring data is regularly sent to the online monitoring IED host or station monitoring.