Product name: HC8031 capacitive equipment insulation online monitoring system
Category: substation intelligent online monitoring system

Detailed introduction

The substation high-voltage equipment insulation online monitoring system adopts bus control technology. It consists of a measurement monitoring system installed in the substation and a data management system installed in the background management center. Through the public telephone network, the monitoring data of several substation monitoring systems can be uploaded to the upper-level data management and diagnosis system to achieve online monitoring of the insulation of high-voltage equipment in multiple substations.

Functional features

1. Flexible configuration

The monitoring device adopts a distributed structure: different types and quantities of local measurement units can be connected to the communication bus provided by the central monitor as needed, that is, local measurement units are installed near each or each group of monitored equipment, and the measured electrical signals can be converted into digital quantities on the spot, and transmitted to the system host through the digital communication bus, and have strong impact resistance.

2. Easy installation and maintenance

Using the field communication bus, all local measurement units are installed below the device under test, and all measurement units are connected through a 4-core shielded cable (one pair is for communication, and the other pair provides 220V working power supply); the construction and installation are simple, and all units and sensors do not need to be calibrated on site. The installation of the measurement unit will not affect the safe operation of the primary equipment.

3. Safe measurement, accurate and reliable data

When sampling the PT secondary signal, it is realized through the reference voltage measurement unit installed nearby, and reliable multiple protection measures are taken to ensure that the PT secondary circuit will not be short-circuited under any circumstances;

When monitoring capacitive equipment such as CT and bushing, a through-type current sensor is used for sampling, and a special protection device is installed; sampling is safe and reliable;

When monitoring zinc oxide lightning arresters, a high-frequency Yin Ni device is installed in the sampling circuit, and the sampling method will not affect the counting function of the original counter;

All local measurement units have strict self-test functions, and all measurement data are transmitted using digital communication methods, which overcomes the signal distortion problem caused by long-distance transmission of analog signals. High-precision current sensors and advanced digital processing and transmission technologies are used to completely solve the accuracy and stability problems of dielectric loss measurement of capacitive equipment.

4. Complete functions

The monitoring device has remote monitoring and analysis functions. It can obtain monitoring data in real time through the local area network and telephone lines, automatically perform fault diagnosis and abnormal alarm, and can display and print relevant curves and tables;

The monitoring device has a real-time self-checking function, which can give clear fault information on the computer in the management center;

The monitoring data will be automatically stored in the SQL database, which can save more than 10 years of monitoring data and can be easily integrated with the MIS system.