基于压力传感器的变压器油位检测和带电补油装置

Oil level measurement and charged oil compensating device of transformer based on pressure sensor

针对变压器储油柜油位计测量中的"假油位"、绝缘油老化以及停电补油等问题,提出一种基于压力传感器的变压器油位检测及带电补油装置。该装置通过在储油柜放油管加装双压力传感器,运用二点压力差分算法对油位进行精准测量,减少因"假油位"造成的重复检修,通过油流和泵体分离、真空循坏排气系统、进油和注油过程分离实现变压器储油柜的不停电补油,降低停电检修次数,有效提高设备整体运行可靠性和用户体验。通过国网保定供电公司现有变压器储油柜改造进行前后对比,验证了该装置测量准确性和实用性。

For the issues of false oil level in the measurement of the transformer oil conservator,the aging of the insulating oil and oil compensating after power failure,the paper proposes an oil level measurement and charged oil compensating device of transformer based on pressure sensor.Through installing dual pressure sensors in the oil storage tank drain pipe and using two-point differential pressure algorithm to accurately measure the oil level,The device can reduce repeating maintenance caused by false oil levels.Then,through the separation of oil flow and pump body,vacuum cycle exhaust system,separation of oil inlet and oil filling process,the oil storage of the transformer oil tank can be realized without power failure.The device can reduce the number of power failure maintenance,and effectively improve the overall operation reliability and user experience of the equipment.Through the transformation and comparison of the existing transformer oil conservator of the State Grid Baoding Power Supply Company,the measurement accuracy and practicability of the device were verified.