Along with the increase of wind power integrated to the power grid

how to quickly and accurately evaluate the capacity credit of wind farms to be built should be taken into consideration in the power system planning. Based on the concept of effective load carrying capacity(ELCC)

this paper evaluates the capacity credit of wind farms on the load side according to the principle that the reliability of the power system should remain unchanged before and after the integration of newly built wind farms. When calculating the reliability index

an accelerated sequential Monte Carlo sampling(ASMCS)method is proposed aiming at the problems that the analytic methods can not take the sequential characteristics of load curve and the traditional simulation methods consume too much time. On this basis

the ASMCS method is combined with linear interpolation method when computing capacity credit of wind power in power systems with high reliability

to avoid the negative influence of numerical oscillation on the iteration process of secant method when calculating the reliability indices by the simulation method. Finally

the actual data of generators

load curve and wind power of Gansu Province and Qinghai Province in China are employed to design an example to verify the correctness and validity of the proposed method.