Product overview

MSDGA-I on-line monitoring system of gas in transformer oil realizes the fine analysis of transformer oil by gas chromatography, which has the characteristics of accurate measurement, fast analysis and real-time monitoring. The monitoring system is mainly used to measure and analyze the trace fault gas contained in the insulating oil of oil-immersed power equipment, and can capture the potential fault information of transformer equipment in real time to ensure the reliable operation of transformer equipment.

MSDGA-I transformer oil gas on-line monitoring system is based on the urgent needs of power users, for the transformer internal overheating and discharge faults such as the development of monitoring equipment, the equipment to make up for the lack of off-line test cycle long, can be on-line timing of long-term monitoring of oil-immersed transformer running status, the results of the timely upload to the background of the monitoring system.

After more than ten years of continuous and repeated research, combined with its professional advantages in the production of high-pressure equipment, Baoding Electric Technology Co., Ltd. has applied the current advanced gas chromatography analysis and fault diagnosis technology on the basis of comprehensive research on the characteristics of various online monitoring technologies at home and abroad.

The composition of the new MSDGA-I transformer oil gas online monitoring system is divided into three parts: MSDGA-I transformer oil gas online monitoring device (referred to as the device) background monitoring system cable and other connecting parts.

Product features:

Technical indicators Dynamic headspace plus vacuum double degassing principle;

Full range linear sensor, full range linear from low concentration to high concentration;

The detection time is short, and a set of detection data can be produced in 1 hour;

High detection sensitivity, the minimum detection limit of C2H2 dissolved in oil can reach 0.1ppm;

Can detect the transformer oil H2, CO, CH4, C2H2, C2H4, C2H6, CO2 and more than seven kinds of gas and water content;

The unique constant temperature system ensures the repeatability and stability of the system analysis;

Forced circulation of oil pump, timely detection, no dead oil sample;

Can be integrated iron core, clamping parts leakage current integration;

Intelligent fault analysis system, all-weather unattended;

Support TCP/IP network protocol, support network remote function.

2. Performance Introduction

2.1 functional indicators

Detection cycle: minimum 2 hours, the longest detection cycle set arbitrarily.

Data storage: ≥ 10 years.

Degassing method: dynamic headspace vacuum double degassing.

Carrier gas mode: 2 8L high purity air cylinders or self-contained gas generator (optional).

Alarm setting: each gas concentration overrun alarm.

Output results: hydrogen (H2), carbon monoxide (CO), carbon dioxide (CO2), methane (CH4), ethane (C2H6), ethylene (C2H4), acetylene (C2H2) and total hydrocarbon values and their concentration spectra, preliminary diagnostic results such as three-ratio values, David's triangle, historical data trend charts, etc., leakage current of micro-water, iron core and clip, etc. are selected according to customer requirements.

Table 1 Technical indicators of on-line monitoring device for dissolved gas in full component oil

[1] The measurement error limit shall be the greater of the two values, the same below.

2.2.2 Measurement repeatability requirements

Under the condition of repeatability, the relative standard deviation RSD of the total hydrocarbon test results of 6 times is less than or equal to 5%.

2.2.3 Minimum detection period

The minimum detection period of the device is less than or equal to 4 hours.

2.2.4 Requirements for carrier gas usage times

The gas supply mode with loaded gas cylinders is equipped with 2 gas cylinders, one for use and one for standby; it can also be equipped with self-contained gas source generator device, which is maintenance-free.

2.3 external configuration

Equipment size: 650 x 500 x 1200mm,85kg.

PK screen (optional):800 × 600 × 2260mm,55kg.

RS-485 communication cable: armored flame retardant fully shielded twisted pair cable, 4 cores.

Fiber/Ethernet: Multimode (IEC61850 optional).

Oil inlet and outlet pipe: special copper pipe, Φ6 × 1.

Oil inlet and outlet valves: engineering matching after professional measurement.

2.4 use environment

Working power supply: AC220V ± 15%,50Hz ± 1Hz,800VA or 1200VA (heat tracing cable according to the project).

Test oil temperature: 0 ℃ ~ 100 ℃.

Ambient temperature:-40 ℃ ~ 65 ℃.

Relative humidity: 5% ~ 95% (inside the product, no condensation, no icing).

Atmospheric pressure: 80kPa ~ 110kPa.

Maximum wind speed: 35 m/s (10m high from the ground, 10min average wind speed, outdoor).

Maximum daily temperature difference: 25 ℃ (outdoor).

Sunshine intensity: 0.1W/cm2 (wind speed 0.5 m/s, outdoor).

Ice thickness: 10mm (outdoor).

Protection class: IP55.

2.5 System Configuration

• On-line monitoring device for gas in MSDGA-I transformer oil: one set.
• MSDGA-I transformer oil gas online monitoring system monitoring software package: a set.
• Background monitoring computer: one set (optional according to need).
• PK screen: one (optional).
• Communication cable: one set.
• Power cable: one set.
• Special matching oil pipe and oil inlet and outlet flange: one set.
• Wireless monitoring alarm function: according to the need (optional).
• Micro water sensor: one set (optional).
• Core leakage current sensor: one set (optional).