液压型风力发电机组并网冲击仿真研究

以液压型风力发电机组励磁同步发电机系统和并网控制系统为研究对象,针对励磁同步发电机的准同期并网条件,建立了同步发电机和励磁系统数学模型。理论分析了同步发电机并网冲击电流和冲击转矩。通过MATLAB/Simulink建立同步发电机、励磁系统和准同期锁相模块仿真模型,采用AMESim软件建立液压调速系统模型,采用联合仿真的方法,对液压型风力发电机组准同期并网过程进行研究,分析了系统并网冲击特性。在实验室搭建30kVA实验台,实验验证了仿真模型和仿真结果的正确性。研究表明定量泵-变量马达液压调速系统能将同步发电机转速稳定控制在准同期并网条件范围内,同时能有效控制系统并网冲击,使风力发电机组平稳并入电网。

Impact of Grid-connecting Simulation Research of Hydraulic Wind Turbine

With synchronous generator of hydraulic model wind power generators and grid control system as the research object,the mathematical model of the synchronous generator and excitation system were established aiming at quasi-synchronizing grid conditions of the excitation synchronous generator,and the synchronous generators grid impulse current and impact torque were theoretically analyzed.The synchronous generator and the excitation system were established through the MATLAB/Simulink along with the quasi-synchronizing phase lock module,and hydraulic governing system model through the AMESim,the process of quasi-synchronizing grid of hydraulic model wind power generators was researched in the method of co-simulation and the system’s grid impact characteristics were analyzed.30 kVA test bench was built in the laboratory and experimental results could verify the simulation model and simulation results.Research shows that quantitative pump-variable motor hydraulic governing system can make synchronous generator speed stability within quasi-synchronizing grid conditions,and at the same time it can effectively control the system’s grid impact,which makes wind power generators smoothly into power grid impact.