计及极端扰动的孤岛微电网潮流优化控制

考虑源荷功率的极端扰动对微电网潮流和频率的影响，以及电流型和电压型微电源在三相潮流控制方面的差异，提出了计及源荷功率极端扰动的孤岛微电网三相潮流的优化控制模型。该模型同时考虑了电流型和电压型两种微电源的控制方式以及源荷功率的静态频率电压特性。模型的目标函数为正常状态的系统网损最小，约束条件考虑了下一时刻源荷功率的正常状态和极端扰动状态的潮流及频率安全约束。为了满足潮流在频率控制方面的要求，对正常状态，除考虑源荷功率的一次调节能力以外，还考虑了电源功率的二次调节能力。而对极端扰动状态，只考虑了源荷功率的一次调节能力。模型的求解采用预测-校正原对偶内点法。IEEE 33节点修正算例系统的仿真结果验证了该模型的有效性。

Three-Phase Power Flow Optimization Control Model for Islanded Microgrid by Considering Source-Load Power Extreme Disturbance

For studying the impact of source-load power extreme disturbance on microgrid power flow and frequency, this paper proposes a three-phase power flow optimization control model for islanded microgrid by considering both current-controlled mode and voltage-controlled mode of micro power source as well as the static frequency-voltage characteristic of the source and load. This model uses the active power loss minimization in normal state as objective function and takes the power flow and frequency of the normal state and extreme disturbance state of the source and power under the next time as safety constraints. The power regulation of the optimization model includes the primary regulation ability of the source and load frequency-voltage characteristic, the secondary regulation ability of the controlled power source under normal conditions, and the primary regulation ability of the source and load during the extreme disturbance. The predictor corrector primal dual interior point method is used to solve the model. The simulation results of the IEEE 33 node modified system were used to demonstrate the effectiveness of the proposed model.