Influence of temperature and humidity on power frequency electric field intensity

The electric field intensity of substation is one of the main factors that influence the safety of power construction, but the strength of electric frequency electric field is affected by many factors. In order to study the effect of temperature and humidity on the electric field strength, the effect of temperature and humidity on the electric field strength was tested by a programmable constant temperature and humidity testing machine and the NARDA company's broadband field strength measuring instrument. The actual data were measured at the 220 kV voltage level of a substation in a place in Yuxi, Yunnan province. The experimental results show that when the temperature is constant, the electric field intensity becomes smaller as the humidity becomes larger. When the humidity is constant, as the temperature becomes larger, the electric field strength becomes smaller. And the influence of the temperature of the substation on the electric field intensity is greater than the influence of the humidity on the electric field strength.