Advantages of fiber optic temperature measurement and monitoring system for hydroelectric generators-INNO

Why do hydroelectric generators need temperature measurement

In hydroelectric power plants or other nuclear power plant equipment, a generator is required. The generator applies direct current to the rotor according to the law of electromagnetic induction, drives the rotor to rotate through the mechanical part, generates electromotive force, and converts mechanical energy into electrical energy. During the operation of the generator, a large amount of heat is generated. In order to ensure the safe and reliable operation of the generator, water cooling is used for the stator bars of large generators, and hydrogen cooling is used for the stator core and rotor. Karena itu, temperature components such as the generator core, upper and lower coils, and outlet water temperature need to be introduced to the monitoring system to monitor the temperature changes in various parts of the generator during operation.

With the increasing capacity of hydroelectric generator units, their importance in the power system is becoming more and more prominent. The operating temperature of the unit is an important indicator of the operation of the hydroelectric generator, especially the temperature of the stator and rotor parts can better reflect the operating situation of the unit. How to monitor the operating temperature of key components in a long-term and accurate manner has always been a concern for hydropower plants. Saat ini, most hydroelectric power plants use platinum resistors for stator temperature measurement, tetapi resistor platinum memiliki kemampuan anti-interferensi yang lemah dalam pengukuran suhu. Setelah waktu pengoperasian unit yang lama, pengukuran suhu tidak akurat dan tidak dapat diganti selama pengoperasian atau pemeliharaan (hanya pada masa renovasi stator), menjadi masalah permanen yang tidak dapat diatasi oleh pembangkit listrik tenaga air. Untuk mengatasi stabilitas dan daya tahannya, pembangkit listrik tertentu membandingkan berbagai metode pengukuran suhu dan akhirnya memilih pengukuran suhu serat optik fluoresen, yang berhasil diterapkan pada stator generator pembangkit listrik tenaga air.

Pembangkitnya sistem pemantauan pengukuran suhu serat optik dapat dihubungkan ke sistem analisis perangkat lunak unit pemantauan generator. The generator state maintenance system should provide a unified data access model and analysis diagnosis model for different equipment, including data calling and processing, monitoring and early warning, status evaluation, predictive evaluation, risk assessment, fault diagnosis and maintenance strategy, dll.. Pada saat yang sama, it is responsible for the installation, adjustment, kalibrasi, testing and testing of the state monitoring system.

Itu sistem pemantauan suhu serat optik collects the temperature of the unit through temperature measuring elements embedded in the stator and rotor of the generator – sensor. The testing components include stator winding, iron core, collector ring, upper and lower pressure fingers, excitation winding, sliding ring, damping bar, dll.. The data is preliminarily analyzed to form a comprehensive on-site monitoring of the equipment. The signal regulator has the ability to communicate data with the power plant computer monitoring system, meeting the software and hardware requirements of the communication interface for the power plant computer monitoring system.