The purpose of promoting the typical design of electrical system for wind farms and modular design method is to improve the design scheme quality and standardization. In this paper, the typical design of electrical system for a wind farm includes the standard designs of wind turbine transformer, collector circuit, substation transformer, primary and secondary electrical systems. As a result, two typical schemes for wind turbine transformer, eighteen modules collector circuits, fifteen alternatives for substation transformer, and six alternatives for wind power output are presented. The typical design and the analysis results shown in this paper is of great importance for promoting the coordinated development of power supply and power grid.