The altitude of Lasa converter station is 4 000 m.For assuring reliable operation of the power capacitor installation and solving the problem of the high altitude influence on the external insulation

the altitude correction of external insulation of capacitor set at Lasa converter station is mainly summarized.The insulation coordination of the capacitor set is calculated through altitude correction of external insulation of the device by the use of technical agreement

a technically reliable and economically reasonable high altitude correction method is defined by the calculation data.The test is performed by the use of high altitude environmental simulation device to verify that the design of altitude correction is reasonable with higher safety factor.The result meets the requirement in such high altitude area.