Transformer Oil Chromatography Online Monitoring System

BP-500
Transformers are important electrical equipment in power systems and are also electrical equipment with more accidents in power systems. Their operating status directly affects the safety level of the system.

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1: Function and significance The transformer is an important electrical equipment in the power system, and it is also an electrical equipment with more accidents in the power system. Its operating status directly affects the safety level of the system. With the increase of the voltage level of the power system and the increase of equipment capacity, people have put forward higher and higher requirements for power supply reliability. Ensuring the safe and reliable operation of the transformer is of great significance to improving the power supply reliability of the power system. Although the necessary protection measures are taken during the operation of the transformer, accidents still occur during operation due to the complex internal insulation structure, uneven distribution of electric and thermal fields, etc. Therefore, in order to ensure the safe operation of the main transformer, people have developed many detection methods. Oil chromatography detection is one of the commonly used methods, which can not only detect faults, but also determine the type of faults and the speed of development of faults. However, chromatography is sampled and analyzed regularly, and it is difficult to detect sudden faults. In addition, the analysis process is complicated, with many links and large human errors. In order to grasp the operating status of the equipment at any time and detect sudden faults, the online monitoring technology is used to monitor the dissolved gas in the transformer oil online, which is of great significance for the state monitoring and state maintenance of power transformers. 2: Device principle BP-500 series online monitoring device for dissolved gas in transformer oil adopts full vacuum degassing technology, oil mist resistant long-life composite support chromatographic column, and MEMS technology micro thermal conductivity detector to achieve full detection of seven gas components and total hydrocarbon content in transformer oil: H2, CO, CO2, CH4, C2H4, C2H6, C2H2. 3: Compliance with standards Q/GDW 10536-2021 Technical Specifications for Online Monitoring Devices for Dissolved Gas in Transformer Oil DL/T 1498.2-2016 Technical Specifications for Online Monitoring of Substation Equipment Part 2: Online Monitoring Devices for Dissolved Gas in Transformer Oil DL/T 722-2014 Guidelines for Analysis and Judgment of Dissolved Gas in Transformer Oil
Oil and gas separation: full vacuum degassing method is adopted, with high separation efficiency and fast speed Gas separation: special composite chromatographic column is used to effectively separate each characteristic component Sampling method: electromagnetic six-way valve automatic sampling, detection and calibration gas path are completely isolated Calibration method: supports standard gas automatic calibration, remote calibration and standard oil sample calibration Online activation: supports automatic activation of chromatographic columns to extend the service life of chromatographic columns Temperature control: dual-loop multi-mode constant temperature control, control accuracy ±0.1℃ Intelligent monitoring: supports automatic adjustment of sampling cycle, and immediately performs secondary sampling verification if the data is abnormal. After confirmation, the sampling cycle is automatically shortened to track the operation status of the transformer in a timely manner Data acquisition: adopts oversampling technology △-∑ analog-to-digital converter, 24-bit resolution, automatic calibration of range and zero point after gain change Output mode: supports digital interface output and 4~20mA analog output of each component concentration Communication mode: chromatographic data collector and station control layer server are connected by optical fiber Ethernet and RS485 Network protocol: supports TCP/IP network protocol, supports IEC61850, IEC104 and other protocols, and meets the requirements of online monitoring and integrated management of smart substations Display mode: report mode/trend chart mode Display content: H2, CO, CH4, CO2, C2H4, C2H2, C2H6, total hydrocarbons, H2O, relative/maximum growth rate Alarm mode: supports two-level alarm, and the alarm signal can be transmitted remotely. Supports alarm output of each component hard contact Expandability: integrated monitoring of transformer oil temperature, core grounding and other working condition information, which can easily expand monitoring items such as transformer partial discharge and bushing insulation Remote maintenance: supports remote maintenance interfaces such as WEB and UDP Intelligent components: designed in accordance with the requirements of Q/GDW 410-2011 "Technical Guidelines for Intelligent High-voltage Equipment" issued by State Grid Corporation, and can be integrated into the transformer intelligent component cabinet Fault diagnosis: based on the improved three-ratio method, David triangle method, cube diagram method, etc. in GB/T 7252 (IEC60599) Risk definition: define the fault risk of the transformer according to IEEE Std C57.104-2008, judge the fault type and severity level, and report the evaluation results to the main IED at any time through the process layer network Analysis cycle: 2 hours, can be set by the user Temperature control accuracy: ±0.1℃ Working power supply: AC85~265V50/60Hz. DC100~240V Impact resistance: Meet GB/T 14537 standard (can withstand harsh level I) Vibration resistance: Meet GB/T 11237 standard (can withstand harsh level I) Storage life: 10 years Working environment temperature: -20℃~55℃ (customizable -40℃~65℃) Working relative humidity: 5~95%, no condensation Electromagnetic compatibility performance: Can withstand the harsh level IV specified in GB/T 17626, meet Q/GDW 535-2010 standard