面向新型配电系统电压支撑的微电网供电性能提升控制策略

Microgrid power supply performance improvement control strategy for new distribution system voltage support

在微电网与传统电网构成的新型电网中,为了满足用户侧电能质量要求,提升交流微电网逆变器输出电压的抗干扰能力和暂态响应速度,文章提出了一种结合线性二次最优控制的扰动残差生成器性能提升控制结构。首先,基于三相逆变器模型建立了二次型最优控制器;其次,根据二重互质分解和尤拉参数化理论,得到基于扰动残差生成器的性能提升控制结构的参数化形式;再次,根据最优控制器模型结构设计二次补偿控制器,抑制补偿控制器所造成的二次扰动;最后,根据用户侧电能质量要求设计了负载投切、三相不平衡以及非线性负载多种实验,验证文章所提控制策略的有效性。

In the new type of power grid composed of microgrid and traditional power grid,in order to meet the requirements of user-side power quality and improve the anti-interference capability and transient response speed of AC microgrid inverter output voltage,this paper proposes a perturbation residual generator performance enhancement control structure combined with linear quadratic optimal control.Firstly,a quadratic optimal controller is established based on the three-phase inverter model.Secondly,the parameterized form of the performance enhancement control structure based on the perturbed residual generator is obtained based on the dual mutual mass decomposition and the Yuler parameterization theory.Then,the quadratic compensation controller is designed according to the optimal contrller model structure to suppress the secondary disturbances caused by the compensation controller.Finally,a variety of experiments on load throwing,three-phase unbalance load and nonlinear load are designed according to the power quality requirements at the customer side to verify the effectiveness of the control strategy proposed in this paper.