多源并存系统过载情况下的预防控制方法

A Preventive Control Method for Overload in the Multi-Source Grid

随着电力系统可再生能源并网的增加,电源结构逐渐复杂化,在电网的预防控制阶段可选择的控制措施也变得复杂多样。提出了多源并存系统中过载预防控制方法。考虑了新能源并网机组的特性,结合了对不同类型发电机组的控制代价,基于控制灵敏度,制定了相应的控制性能指标,以控制前后的系统风险最小为目标函数建立了预防控制的数学模型。通过IEEE39节点测试系统的仿真,验证了控制方法的有效性,并从随机过程的角度分析出风速随机波动特性,提出了风速随机波动特性修正的风电。

With the increasing integration of renewable energy sources in the power grid,the structure of power sources is gradually more complicated,so are preventive control mea-sures available in the prevention stage of the power grid. Thus,This paper proposes a preventive control method for the overload condition in the multi-source grid. Considering the characteristics of renewable energy units and the control cost of different types of units,the method formulates a control performance index based on the control sensitivity. The objective function is to minimize the sum of control cost and post-control overload risk. In the end,the validity of the method is verified through the simulation with the IEEE 39-bus testing power system.