电压源风电机组的全风速段惯量响应控制

Recent years, with the increase of installed capacity of new energy, the traditional power system which dominated by synchronous machines has shown a trend of lacking inertia, and the frequency stability of the power system is facing challenges. Voltage source control enables wind turbines to independently support the frequency and voltage of the grid, which is a key technology for building the new power system. However, current control method for inertia response of voltage source wind turbines focuses on the MPPT stage, lacking of systematic research on the characteristics and methods in the low constant speed, high constant speed and constant power stages, which weakens the overall inertia response capability of the turbine. In view of the above problems, this paper proposed a voltage source wind turbine inertia response control method at the full wind speed section, analyzed the inertia response characteristics of the whole wind speed section, and proposed a dual speed loop control structure with a constant saturation output of the regulator to realize the speed control and the seamless switching of different operating ranges adopts the combined judgment method of DC voltage change rate and generator speed to realize the selective inertia response control of the unit in the whole wind speed section. Based on the design method of control parameters, a full electromagnetic transient simulation model of a 2MW permanent magnet direct-drive wind turbine based on PSCAD was built, which verified the effectiveness of the proposed control method.