电池储能系统用于改善并网风电场电能质量和稳定性的研究

建立了基于等效电路的电池储能系统和基于异步发电机风力发电系统的整体动态数学模型,设计了相应的控制策略,并以随机风和电网大扰动为例,采用电池储能系统对并网风电场的电能质量和稳定性问题进行仿真。结果表明采用该控制策略的电池储能系统可很好地改善并网风电场的电能质量和稳定性。

Improvement of Power Quality and Stability of Wind Farms Connected to Power Grid by Battery Energy Storage System

The authors research the possibility of employing battery energy storage system(BESS)for providing auxiliary service to enhance the performance and controllability of a large wind farm.A mathematic model of battery energy storage system(BESS)based on equivalent circuit and an asynchronous generator based global dynamic mathematical model for wind power generation system are built,and corresponding control strategy is developed.Based on these models,a simulation platform of BESS and wind farm is developed by using Simulink of the Matlab.Taking the wind speed changed at random and serious disturbance in power grid for example,using the detailed wind turbine model and squirrel-cage asynchronous generators the simulation of improving power quality and stability of wind farm connected to power grid by BESS is performed.Simulation results show that the power quality and stability of wind farm connected to power grid can be well improved by battery energy storage.