基于光热电站与电动汽车的综合能源系统风电消纳策略

Wind power consumption strategy of integrated energy system based on concentrating solar power and electric vehicle

针对热电联产机组“以热定电”约束导致的弃风问题,提出一种基于光热电站(CSP)与电动汽车的区域综合能源系统风电消纳策略。首先,构造了CSP与热电联产机组协同运行的模型,研究了CSP配合联供机组实现热电解耦的机理;其次,分析了电动汽车无序充电对降低净负荷波动的负特性,通过引入车网互动(V2G)策略挖掘了负荷侧可调度资源削峰填谷的能力;然后,以运行成本及CSP日投资成本最小为目标建立了日前经济调度模型,探讨了电动汽车不同并网方式对CSP容量配置的影响,并利用条件风险价值定量分析了由预测误差引起的风险损失。基于求解器CPLEX展开多场景对比分析,结果表明:所提策略能够有效降低系统的弃风量和总调度成本,同时可为决策者在经济性与安全性之间的权衡提供参考方案。

Aiming at solving the problem of wind abandonment caused by “setting electricity by heat” constraint of cogeneration of heat and power(CHP) units,a wind power consumption strategy of regional integrated energy system based on concentrating solar power(CSP) and electric vehicle is proposed.Firstly,the model of coordinated operation of CSP and CHP is constructed,and the mechanism of decoupling heat and power through CSP combined with CHP unit is studied.Secondly,the negative characteristic of disordered charging of electric vehicle on reducing net load fluctuation is analyzed,and the capacity of load side schedulable resource for peak cutting and valley filling is explored by introducing vehicle to grid(V2G) strategy.Then,a day-ahead economic scheduling model is established with the objective of minimizing the operating cost and CSP daily investment cost,and the effect of different electric vehicle grid connection modes on the CSP capacity allocation is discussed,and the risk loss caused by prediction error is quantitatively analyzed by conditional value at risk.Based on the solver CPLEX,comparative analysis of multiple scenarios is carried out.The results show that,the proposed strategy can effectively reduce the amount of wind abandonment and total dispatching cost of the system,and provide a reference scheme for decision makers to balance economy and security.