With the rapid increase of intermittent energy

typically wind energy

the dispatch mode of power system will develop from “generation tracking load” dispatch to the “sourcegridload” smart interactive dispatch. At the same time

both the power supply side and load side have uncertainties. In order to deal with the problem

this paper considers the uncertain factors in three aspects

the uncertainty of wind power output fluctuation

that of load variation

and that of the interactive process. First

the form of characterization for the price elasticity load response probability considering uncertainty is described. Through the price elasticity coefficients

the uncertainty of the price elasticity load response and the range of response are analyzed to reflect the randomness and subjectivity of the response behavior. Then

based on the traditional mathematical model of probabilistic power flow calculation

the uncertainty demand response quantity is regarded as randomly injected variables and introduced in the “wind powerprice elasticity load” interactive probabilistic load flow model to improve the comprehensiveness and accuracy of the demand response mechanism. And the point estimation method is used to calculate the statistical characteristics of power flow value. The digital simulation results of an IEEE 73bus system show that the model uses the priceelasticity load response to bridge the gap due to the power output fluctuation of wind power. Also

the adverse impact on branch power flow is reduced. The point estimation method used to solve the model is expected to effectively deal with both discrete and continuous uncertainties thanks to the high precision and light workload. This work is supported by National Basic Research Program of China (973 Program) (No. 2013CB228206) and State Grid Corporation of China.