考虑源荷相关性的独立微电网日前风险调度策略

Day-ahead risk scheduling strategy of independent microgrid considering source-load correlation

随着微电网内分布式可再生能源的渗透率提升,灵活资源调度不足导致的弃光和失负荷会对微电网运行造成较大的影响。通过充分调度各类分布式灵活资源,提出一种计及源荷相关性的微电网日前风险调度策略。在考虑灵活资源的独立微电网调控架构下,采用考虑相关性的拉丁超立方抽样方法处理分布式光伏及负荷的不确定性,分析相关性影响下的微电网期望调度成本、弃光与失负荷损失成本及条件风险成本,构建总调度成本期望值最小的日前优化调度模型。仿真结果表明,所提策略通过合理调度灵活资源及预留备用容量,能够有效平衡微电网运行经济性及运行风险。

As the penetration rate of distributed renewable energy within microgrids increases,insufficient flexible resource scheduling leading to curtailment and loss of load will have a significant impact on the operation of microgrids.A microgrid day ahead risk scheduling strategy that takes into account source load correlation by fully scheduling various distributed flexible resources is proposed.Under the independent microgrid regulation architecture considering flexible resources,the Latin hypercube sampling method considering correlation is adopted to deal with the uncertainty of distributed photovoltaics and loads.The expected scheduling cost,loss cost of abandoned light and load,and conditional risk cost of microgrids under the influence of correlation are analyzed,and a day-ahead optimization scheduling model with the minimum expected total scheduling cost is constructed.The simulation results show that the proposed strategy can effectively balance the economic and operational risks of microgrid operation by reasonably scheduling flexible resources and reserving reserve capacity.