微电网黑启动中考虑DG特性与线路投入顺序的串行恢复策略

制定合理的孤立微电网黑启动恢复策略对于加快微电网的恢复进程、减少事故损失具有重要意义。提出了一种适用于微电网黑启动的串行恢复策略。首先分析了分布式电源(Distributed Generation, DG)与大电网中传统火电机组所不同的特性，在此基础上建立了基于变异系数法的DG黑启动能力评估模型，并用于选取黑启动电源。然后以线路重要度和节点重要度作为网架重构的指标，建立了网架重构优化模型，并采用遗传算法进行求解。在求解出目标网架后，以单位时间内恢复发电量最大为目标，进一步确定线路的投入顺序。最后通过算例的分析及结果验证了所提方案的有效性。

A serial restoration strategy considering characteristics of DG and line restoration sequence for black start of microgrid

Developing a rational restoration strategy for black start of isolated microgrid helps to speed up the system restoration and reduce the loss. A serial restoration strategy, which is suitable for black start of microgrid, is proposed. Firstly, on the basis of the different characteristics between distributed generation (DG) and traditional unit, an evaluation model, which is used to assess the black start capability of DG and select the black-start generation, is established based on the variation coefficient method. Secondly, a network reconfiguration optimization model is built by taking the node importance and the line importance as the indicators, and the model is solved by genetic algorithm. Then, the restoration sequence of lines is determined by maximizing the restored generation capacity in per unit time. Finally, the simulation results verify the validity of the proposed scheme. This work is supported by National Natural Science Foundation of China (No. 51407128).