基于频率调整策略的微电网多目标优化自愈控制

发布时间：2019-07-05 11:08

【摘要】：针对微电网由并网转孤岛运行时自愈控制过程中的电能质量、经济性、负荷支撑和快速响应等多方面的需求,考虑负荷、分布式电源的随机性特点,以微电网频率控制为主线,提出了基于频率调整的多目标优化自愈控制策略。该策略中,将微电网由并网转孤岛运行的优化自愈控制分为2个主要阶段:第1阶段为一次和二次调频阶段,一次调频通过分布式电源的下垂控制实现,在二次调频中使用了按成本大小依次投退分布式电源的优化控制策略,实现微电网功率平衡及经济运行下的频率、功率稳定;第2阶段为三次调频阶段,以经济运行和最大负荷支撑为目标,综合考虑负荷、分布式电源的随机性,引进机会约束规划算法将不确定量转化为确定量,实现微电网最大负荷支撑下的经济运行。
[Abstract]:aiming at the demands of the power quality, the economy, the load support and the quick response in the self-healing control process when the micro-power grid is operated by the grid-connected island, the random characteristics of the load and the distributed power supply are taken into account, the frequency of the micro-power grid is controlled as the main line, A multi-objective optimal self-healing control strategy based on frequency adjustment is proposed. in the strategy, the optimized self-healing control for the operation of the micro-power grid from the grid to the island is divided into two main stages: the first stage is the primary and secondary frequency modulation stages, the primary frequency modulation is realized through the droop control of the distributed power supply, in the secondary frequency modulation, the optimized control strategy of the distributed power supply is put in turn according to the cost size, the power balance of the micro power grid and the frequency under the economic operation are realized, the power is stable, the second stage is the third frequency modulation stage, the economic operation and the maximum load support are taken as the target, and the load is comprehensively considered, The randomness of the distributed power supply, the introduction of the opportunity-constrained programming algorithm to convert the uncertain quantity into the determined quantity, and realize the economic operation under the maximum load support of the micro-power grid.
【作者单位】：湖北省新能源微电网协同创新中心(三峡大学);
【基金】：国家自然科学基金项目(51277110)~~
【分类号】：TM727

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