Which factory is good for online temperature monitoring system of oil immersed transformer winding-INNO

油入変圧器の寿命を監視する方法

電力産業の機器では, 油入変圧器は電圧と電流の変換において重要な役割を果たします, 動力伝達も同様に. その性能は電力システム全体の安全で安定した動作に直接影響します。. Analyzing, 判断する, 変圧器の過熱障害の防止は、変圧器メーカーおよび関連部門にとって広く懸念される問題となっています。. 現在、変圧器の残りの寿命を定量的に説明できる、単純かつ独自の寿命終了基準はありません。.

Why do oil immersed transformers need temperature measurement

油入変圧器の性能は電力システム全体の安全で安定した動作に直接影響します。. 全負荷での長期運転と全密閉構造の採用により, transformers often generate heat in various parts. 多くの場合, workers cannot measure certain narrow positions inside the transformer, especially the temperature on the winding that frequently heats. If the temperature of the transformer is too high during long-term operation, it will cause aging of the heating components, directly threatening the safety of the entire power grid. In large power transformers, transformer oil plays a crucial role in insulation, 熱放散, and arc suppression, and is crucial for the safe operation of transformers. If the oil temperature of the transformer rises too high, it will lose its insulation effect, cause breakdown accidents, and even affect the service life of the transformer. したがって, online monitoring and real-time control of transformer oil temperature are particularly important.

The Relationship between Life and Temperature of Oil Immersed Transformers

Power transformer is one of the core equipment in the operation of the power system. From the perspective of transformer insulation operation life, the transformer winding has a normal life (20 年) when the average annual temperature is 98 ℃; When the temperature exceeds 98 ℃, for every 6 ℃ increase, the lifespan of the transformer is reduced by half, which is the “6 程度” rule. The winding temperature of power transformers is closely related to their lifespan, so it is necessary to monitor the winding temperature online. しかし, it is difficult to directly test the winding temperature. 一般的に, the winding temperature is calculated by testing the oil temperature of the transformer. This is because the average temperature of the transformer winding is 10 degrees higher than the oil temperature, 変圧器の油温がテストされている限り, 変圧器巻線の温度を測定できます. 油入変圧器の寿命と負荷容量は油温と密接な関係があります。. 高温で動作する変圧器は過熱により初期故障が発生しやすくなります.

変圧器の動作温度は、変圧器の動作状態と絶縁劣化の度合いを決定する上で重要な役割を果たします。, 変圧器の運転や保守において細心の注意が必要な指標です。. 油入変圧器は送変電システムの主要機器です, 巻線の温度が耐用年数を直接決定します。. 段階的絶縁を備えた変圧器用, increasing a certain temperature doubles the aging rate of insulation and reduces the working life of the transformer by half.

変圧器油温の監視方法

現在のところ, some in China use the top oil temperature of transformers as the switching signal to ensure the safe operation of transformers, and use the top oil temperature as the judgment basis for transformer monitoring devices to ensure the safe operation of transformers by monitoring the top oil temperature. しかし, this method has many shortcomings. This is because the top oil temperature of large capacity transformers lags significantly behind the winding oil temperature. When the transformer load increases rapidly, due to the speed of heat transfer response, it takes several hours for the top oil temperature of the transformer to reflect the changes in winding conditions. 明らかに, using the top oil temperature of the transformer as the switching signal to ensure the safe operation of the transformer cannot timely and effectively protect the safe and reliable operation of the transformer. The temperature of the transformer winding determines the service life of the transformer. For transformers with AA insulation, the insulation operating life is generally believed to follow the six degree rule: a normal life is obtained when the annual average temperature is 98 ℃. For every 6 ℃ increase in the annual average temperature, the aging rate of the transformer insulation doubles, and the service life of the transformer decreases by half. したがって, the hottest temperature of the transformer winding is the determining factor for the safe, 経済的な運転, and service life of the transformer.

とは何ですか transformer oil temperature gauges available

The current temperature measurement methods for transformer windings in power equipment mainly include thermal resistance temperature measurement, thermoelectric coupling temperature measurement, oil temperature meter combined with calculation current method temperature measurement, 赤外線温度測定. しかし, the winding is in a special environment of high voltage, 高温, and high magnetic field, and both thermal resistance and thermoelectric coupling need to use metal wires to transmit signals, which will cause electromagnetic interference to the environment. Metal wires are prone to aging and short circuits when they are in oil for a long time. Infrared temperature sensors cannot be installed in transformers and can only measure the surface temperature of transformers. The measurement results are affected by environmental temperature. The indirect measurement method using oil temperature meters has the disadvantage of large errors and cannot be directly measured. したがって, it is currently unable to effectively measure the temperature of transformer windings.

Fiber optic online temperature measurement system for oil immersed transformers

現在のところ, in the field of transformers in China, the method of using point type optical fiber to measure the temperature of transformer windings has gradually been recognized. の fiber optic winding transformer temperature measurement device can monitor the hot spot position of the transformer oil flow in real-time under arbitrary changes, timely detect faults and safety hazards, and improve the reliability of power transformer operation. The transformer winding temperature measurement device can achieve online safety monitoring of winding temperature, without being affected by strong electromagnetic interference inside the transformer, 高い測定精度を持っています, solving the problem of ineffective measurement of internal winding temperature in transformers.