风电场一次调频分层协调控制研究与应用

大规模并网风电场参与一次调频是电网为保证自身安全做出的必然选择,有功响应的快速性和稳定性是风电场需要解决的关键问题。提出一种基于分层架构的风电场参与电网一次调频的控制策略。在风电机组控制层,提出了一种改进的带惯量补偿的有功控制策略,提高一次调频的响应速度。在风电场控制层通过改进的惯量响应协调控制和功率备用控制策略,避免电网频率出现波动,并满足不同风况下备用功率的要求。基于Matlab/Simulink建立了含风电场的电力系统仿真模型,仿真结果表明风电场具备全工况条件下参与电网一次频率调整的能力。最后在某49.5 MW风电场现场验证了所提控制策略的有效性。

Research and application on primary frequency regulation of wind farms based on hierarchical coordinated control

Large scale grid-connected wind farms participating in primary frequency regulation is an inevitable choice for the grid to protect itself, and the fastness and stability of active power response are the key issues that need to be solved in a wind farm. This paper presents a control strategy for wind farm participating in grid primary frequency regulation based on hierarchical structure. In the wind turbine control layer, an improved active power control strategy with inertial compensation is proposed to improve the response speed of primary frequency regulation. In the wind farm control layer, through the improved inertia response coordinated control and power reserve control strategy, the grid frequency fluctuations are avoided and the reserve power requirements under different wind conditions can be met. Based on Matlab/Simulink, a power system simulation model with wind farm is established, and the simulation results show that the wind farm has the ability to participate in grid primary frequency regulation under full working conditions. Finally, the effectiveness of proposed approaches is confirmed by field tests in a 49.5 MW wind farm. This work is supported by National Key Research and Development Program of China (No. 2018YFB090402) and Science and Technology Project of State Grid Corporation of China (No. NYB17201700151).