Test scheme of transformer temperature rise and analysis of influencing factors
变压器温升试验方案及影响因素分析

摘要

变压器作为电力系统中的重要设备，其安全性和稳定性对于保障电力供应的可靠性具有重要意义。温升是影响变压器寿命和稳定性的重要因素之一，为明确变压器壳体、内部结构、冷却介质对温升的影响，本次以油浸变压器为试验对象，通过对顶层油温以及高、电压绕组温升进行试验测量。结果表明，变压器位于变电箱壳体外部时，温升变化明显小于处于内部时的温升变化。由此可以确定，变电箱壳体对变压器散热有着直接影响，同时根据本次实验用变压器内部结构、冷却介质等，分析对温升的影响，并提出相关措施，以防止变压器温度升高。希望能够为降低变压器温升，提高使用效率与安全性提供一定借鉴。

Abstract

Transformer as an important equipment in power systems, its safety and stability are of great significance to ensure the reliability of power supply. Temperature rise is one of the important factors affecting the life and stability of the transformer. In order to clarify the influence of the transformer shell, internal structure and cooling medium on temperature rise, the oil-immersed transformer is taken as the test object, and the top oil temperature and the temperature rise of the high and voltage windings are tested and measured. The results show that when the transformer is located outside the shell of the transformer box, the temperature rise change is obviously smaller than that when the transformer is inside. It can be determined that the shell of the transformer box has a direct impact on the heat dissipation of the transformer. Based on the internal structure and cooling medium of the transformer used in this experiment, the impact on temperature rise is analyzed, and relevant measures are proposed to prevent the temperature rise of the transformer. It is hoped that it can provide some reference for reducing transformer temperature rise and improving efficiency and safety.