基于模型预测控制的光伏场站快速协同无功电压控制

为解决新能源大规模接入配电网带来的电压波动及越限问题，提出了一种针对光伏场站及静止无功发生器(static var generator, SVG)接入的配电网系统动态无功电压控制方法，以实现扰动下多无功源协同调压目标。首先，分别推导了光伏场站和SVG的无功-电压控制小信号模型。其次，通过类比等效实现了不同类型无功源电压控制模型形式的统一，并结合系统电压灵敏度关系建立了系统整体电压控制模型。在此基础上考虑系统状态变化对控制参数的影响，并计及各设备无功出力约束，设计了系统模型预测控制器。最后，基于IEEE33节点系统进行仿真，验证了在光伏出力波动和负荷投切两种情况下所提方法均能够快速、有效地抑制电压波动，为有源配电网快速电压协同控制提供了理论基础。

Fast cooperative reactive voltage control for photovoltaic stations based on model predictive control

To solve the voltage fluctuation and limit crossing problems of distribution networks brought by the extensive access of new energy sources, a dynamic reactive power-voltage control method is proposed connected with PV stations and static var generators (SVGs) to achieve the goal of cooperative voltage regulation of multiple reactive power sources under disturbance. First, reactive power-voltage control small-signal models are derived for PV stations and SVGs. Second, the voltage control models of different types of reactive power sources are unified by analogical equivalence, and the overall system voltage control model is established by combining with system voltage sensitivity. A system model prediction controller is designed considering the influence of system state change on control parameters and taking into account the reactive power output constraint of each piece of equipment. Finally, based on simulation of the IEEE 33-node system, the results show the proposed method can quickly and effectively suppress voltage fluctuations under both PV output and load fluctuations. This provides a theoretical basis for fast cooperative voltage control in active distribution networks.