Abstract: Recent years, as the main power export province in the national strategy of transmitting electricity from west to east, Guizhou province shows a rapid development in wind power. Presently, there are high voltage problems in two substations integrated with wind farms called Weining and Hezhang in Bjjie Area which ownes the richest wind power resourses in Guizhou province. This paper combined actual situation of the two substations and the relative standards such as Technical rule for connecting wind farm to power system to analyze the cause of high voltage problems, and on the basis of which gives considerations to the long term power grid connection and the Inductive reactive power balance results of the two substations, finally put forward the countermeasures of installing appropriate amount of low voltage reactors on the low voltage buses of the two substations.

Key words: wind farm, substation, voltage, Bijie area