含源-荷-储的虚拟电厂经济性优化运行研究

虚拟电厂(VPP)作为一种新兴的能源聚合形式,可以降低风电、光伏等新能源入网时输出功率不确定性对电网安全的影响,提高供电可靠性,是未来新能源并网发展的方向。为提高VPP的调度灵活性,降低发电成本,使VPP获得更好的效益,在以往研究的基础上考虑负荷对VPP的影响,构建了考虑源-荷-储联合运行的VPP经济性优化调度模型,为减小预测误差并提高VPP收益,调度模型采用了多时段尺度优化和多市场盈利模式,最后采用粒子群算法对模型进行求解,优化VPP内各能源的出力。仿真算例分析了VPP内部各电源及VPP的出力优化情况,对比分析了可中断负荷参与VPP调度及其占比变化对VPP收益的影响以及4种不同运营模式下VPP的经济性差异。仿真结果表明,通过聚合适当比例的可中断负荷并采用合理的运营模式可以提高VPP的灵活性和经济性,算例验证了源-荷-储联合运行的VPP经济性优化调度模型的合理性。

Research on Economic Optimization Operation of Virtual Power Plant with Source-load-storage

As an emerging form of energy aggregation,virtual power plant(VPP)can reduce the impact of output power uncertainty on grid security when new energy sources such as wind power and photovoltaics enter the network,and improve the reliability of power supply,which is the development direction of new energy grid connection in the future.In order to improve the dispatching flexibility of the VPP,reduce the power generation cost,and make the VPP obtain better benefits,based on the previous research,the impact of the load on the VPP was considered,and the VPP economic optimization scheduling model considering the source-load-storage joint operation was constructed.In order to reduce the prediction error and improve the revenue of VPP,the scheduling model adopts multi-period scale optimization and multi-market profit model,and finally uses the particle swarm optimization algorithm to solve the model and optimize the output of each energy source in the VPP.Through the simulation example,the output optimization of each power supply in VPP and VPP was analyzed,the impact of interruptible load participation in VPP scheduling and its proportion change on the VPP revenue and the economic difference of VPP under four different operating modes were compared and analyzed.The simulation results show that the flexibility and economy of the VPP can be improved by aggregating the appropriate proportion of interruptible load and adopting a reasonable operation mode.The example verifies the rationality of the VPP economic optimization scheduling model of source-load-storage joint operation.