干式变压器非电量保护优化与应用

Optimization and Application of Non-Electrical Quantity Protection for Dry-Type Transformers

干式变压器传统的非电量保护是通过变压器的温控箱输出报警和跳闸接点至非电量保护装置以实现变压器超温跳闸,这种非电量保护逻辑存在保护误报警的问题,降低了厂用电的可靠性。针对该问题,提出了在干式变压器内新增至计算机监控系统的测温RTD,优化非电量保护逻辑。现场运行实践表明该优化方案效果明显,为干式变压器非电量保护逻辑优化提供了参考依据。

The traditional non-electrical quantity protection for dry-type transformers relies on the temperature control box of the transformer to output alarm and trip signals to the non-electrical quantity protection device to achieve over-temperature trip.However,this logic of non-electrical quantity protection may lead to false alarms,thereby reducing the reliability of the power supply.To address this issue,it is proposed to add a temperature-measuring RTD(Resistance Temperature Detector)to the computer monitoring system inside the dry-type transformer and optimize the non-electrical quantity protection logic.Field operation practices have shown that this optimization scheme is effective,providing a reference for optimizing the non-electrical quantity protection logic for dry-type transformers.