Multi-Resource Joint Power Dispatch with Coordinated Consideration of Deep Peak and Frequency Regulation Requirements

With the rapid development of renewables, the stress for deep peak regulation (DPR) and frequency regulation (FR) of power systems is increasing because of the degradation of controllable resources and the uncertainty of renewables. Reasonable power dispatch is an effective way to handle the above challenge. However, the sequential dispatch (the FR is dispatched first, and then the DPR is dispatched) is currently used in the power dispatch department, which cannot coordinately consider the DPR and FR requirements. In this way, the capability of remaining resources for DPR may not meet the requirement. With this in mind, a multi-resource joint power dispatch with coordinated consideration of DPR and FR is proposed in this paper. Thermal power units, hydropower units, and pumped storage are involved as regulation resources. The objective is to minimize the total operating costs. The DPR and FR requirements are both considered in the proposed power dispatch method. Besides, the mutual exclusive constraint for DPR and FR services is modeled to ensure that the regulation resources can only participate in one of the DPR and FR services. Case studies demonstrate that the proposed method can achieve the coordinated dispatch of the regulation resources between the DPR and FR requirements, and thus, guarantee the operating economy and security of power systems.