When bidding with the distribution utilities in an electricity market， distributed generators（DG）， which are controlled by customers， tend to start and connect to the grid when the load demand is high. A starting model of induction distributed generators（IDG） in a distribution network is firstly proposed. Based on the proposed model， the starting transient of several IDGs in a 10 kV system of Hangzhou Power Grid is simulated. The results show that simultaneous starting of IDGs may lead to voltage sags or current increasing suddenly. This demonstrates the adverse impact of IDGs on the operation and control of distribution networks. Subsequently， shunt capacitor banks and autotransformer starters are suggested to mitigate the impact， and simulation results prove that these measures are reasonable and effective. The advantages and disadvantages of these measures are also compared.