大规模风电参与一次调频下基于机组快速启动能力的日内滚动调度

Intra-day rolling dispatch considering large-scale wind power participating in primary frequency regulation based on unit fast start-up capability

考虑风电机组通过减载运行方式与常规机组共同参与系统一次调频,进一步挖掘了电源资源的快速启动能力,将热、温态火电机组作为日内应急备用的一部分。提出了一种稳态-暂态协调优化的日内滚动调度模型,在多种高风险随机场景下考虑系统的暂态频率安全,同时需求侧可中断负荷也被作为系统一次调频的备用来源。提出内-外层迭代的方法对上述模型进行求解,外层筛选出用于暂态优化的高风险场景集,内层进行稳态-暂态协调优化,确定机组组合方案、可中断负荷切除量和被迫弃风量。最后,在改进的新英格兰10机39节点系统上验证了所提方法的有效性,结果表明所提方法可实现系统日内一次调频备用需求的全覆盖,并同时兼顾了系统的安全性和经济性。

Wind turbines participating in PFR(Primary Frequency Regulation) by deloaded operating mode together with conventional units is considered. At the same time,the fast start-up capability of power resources is further explored,and warm and hot thermal power units are also considered as part of the intraday emergency reserve. An intra-day dispatch model considering coordination optimization of steady state and transient state is proposed,which evaluates the transient frequency security of system in a variety of high-risk stochastic scenarios. Besides,the interruptible load on demand side is also used as the PFR reserve source. The inner-outer iterative method is proposed to solve the above model. The outer layer selects out high-risk scenarios for transient optimization. The inner layer carries out coordination optimization of steady state and transient state to determine the unit commitment result,interruptible load removal and forced wind curtailment. Finally,the effectiveness of the proposed method is validated on the improved New England 10-machine 39-bus system. The results show that the proposed method can achieve full coverage of the system’s intra-day reserve requirements,while taking the security and economy of the system into account.