计及光热电站与风氢系统互补运行的低碳经济调度策略

Low-carbon economic scheduling strategy with complementary operation of concentrated solar power plant and wind-hydrogen system

为促进风能高品质利用、降低系统的碳排放水平,提出一种光热电站与风氢系统互补运行方式:将系统弃风作为制氢的电力来源以实现同节点下两者的光热-氢耦合。分析了光热电站中不同电转热环节对系统低碳经济效益的影响,将电转气的氢能利用阶段分为CO_(2)甲烷化和氢燃料电池运行,二者作为低碳技术的有效手段,辅之以绿证-碳交易机制的低碳市场政策,进一步挖掘联合运行系统的减排能力;以系统综合运行成本最低为目标建立低碳经济调度模型,再利用McCormick方法将混合整数非线性优化问题转化为混合整数线性优化问题,并运用CPLEX求解器对模型进行求解;在改进的IEEE 30节点系统上进行仿真验证,通过多场景的设置,对比验证所提策略的有效性。

To promote the high-quality utilization of wind energy and reduce the carbon emission level of system,a complementary operation mode of the concentrated solar power plant and wind-hydrogen system is proposed.The wind abandonment of system is used as the power source of hydrogen production to realize the coupling of photothermal and hydrogen at the same bus.The influences of different power to heat links in the concentrated solar power plant on the low-carbon economic benefits of the system are analyzed,and the hydrogen energy utilization stage of power to gas is divided into the operation of CO2 methanation and hydrogen fuel cell.As an effective means of low-carbon technology,both of them are complemented by the low-carbon market policy of the green certificate-carbon trading mechanism to further explore the emission reduction capacity of joint operation system.The low-carbon economic scheduling model taking the minimum comprehensive operation cost of system as the objective is established.Then,the mixed-integer nonlinear optimization programming is transformed into the mixed-integer linear optimization programming by the McCormick method,and the model is solved by CPLEX solver.The simulation verification is carried out on the improved IEEE 30-bus system,and the effectiveness of the proposed strategy is verified by comparison with different setting scenarios.