考虑碳捕集电厂综合灵活运行下的含P2G和光热电站虚拟电厂优化调度

Optimal Scheduling of Virtual Power Plant with P2G and Photo-Thermal Power Plant Considering the Flexible Operation of Carbon Capture Power Plants

为了实现电力系统能源低碳化,大力发展碳捕集与封存技术和风光等新能源是低碳化的重要举措。但碳捕集电厂的最小出力技术约束和风电的反调峰特性限制了风电消纳和碳减排,利用碳捕集灵活运行方式下储液罐进行“能量时移”和“碳转移”,间接消纳风电和减少碳排放。利用碳捕集设备捕集的CO;作为电转气原料,降低碳封存成本和电转气成本,进一步消纳弃风电量并获得售气收益。由于负荷具有早晚高峰特性,因此利用含储热式光热电站的良好调峰性能将白天的部分热量转移至晚高峰发电,缓解系统调峰压力。为此,文章构建了碳捕集电厂综合灵活运行下含电转气和光热电站虚拟电厂优化调度模型。并运用Matlab软件中YALMIP工具包中的商用求解器Cplex对模型进行优化计算。仿真结果表明,所提模型能进一步减少弃风、减少碳排放和缓解调峰压力。

In order to achieve low-carbon energy in the power system,the measures like vigorously developing carbon capture and storage technologies and new energy sources such as wind and solar power are very important.However,the technical constraints of the minimum output of carbon capture power plants and the reverse peak-shaving characteristics of wind power have restricted the wind power consumption and carbon emission reduction.The liquid storage tank under the flexible operation mode of carbon capture is used to carry out“energy time-shift”and“carbon transfer”,which can indirectly absorb wind power and reduce carbon emissions.CO;captured by carbon capture equipment may be used as the raw material for power-to-gas to reduce carbon storage costs and power-to-gas costs,which is helpful to furtherion eliminat of wind power and obtain gas sales revenue.Because the load has morning and evening peaks,the good peak-regulation performance of the thermal storage type concentrating solar power(CSP)station is used to transfer part of the heat during the day to the evening peak power generation,so as to relieve the system’s peak-regulation pressure.To this end,this paper constructs an optimal scheduling model for virtual power plants containing power-to-gas and solar thermal power plants considering the comprehensive and flexible operation of carbon capture power plants.The commercial solver Cplex in the YALMIP toolkit of Matlab software is used to optimize the model in this paper.The simulation results show that the proposed model can further reduce wind curtailment,reduce carbon emissions and alleviate peak-shaving pressure.