Analysis of short-circuit current calculation method in wind power plant design

摘要

Due to the differences between wind power plant and normal power plant in mathematical model and network structure, it will lead to great discrepancy between the results worked respectively by the practical method of normal short-circuit current calculation and the international popular IEC60909 method in engineering design. Therefore this paper analyzes the differences between the two methods and put forward an improved practical method. Finally with the simplified modeling of collection lines, the effectiveness and feasibility of this method is verified by the actual wind power plant data and simulation results with ETAP. This method offers some ideas to the establishment of uniform standards of short-circuit current calculation method of wind power plant in our country.