In order to analyze the effects of secondary voltage control on static voltage stability， a continuation power flow model in view of secondary voltage control is established according to a new bus classification scheme. How to handle the violation of reactive power limits of generators and the voltage limits of the controlled generators in this model is given. Computational results on the IEEE 39-bus system demonstrate that the secondary voltage control can enhance the static voltage stability margin and postpone occurrence of generator reactive power limit violations during load increment. However， if the reactive power coordination factor in each control area is defined by balanced mode of generator reactive power outputs， voltage collapse will occur because the generators in the same control area violate their reactive power limits simultaneously.