含柔性负荷火电机组深度调峰的源荷协调分层优化调度

Source and Load Hierarchical Optimization Dispatch for Deep Peak Shaving of Thermal Power Units Considering Flexible Load

摘要:

风电大规模接入对系统调峰带来巨大挑战，为解决因系统调峰能力不足导致弃风问题，提出一种含柔性负荷的火电机组深度调峰的源荷分层优化调度方法。该方法分为上层和下层两个优化模型，上层以系统峰谷差最小为目标，旨在减少系统调峰压力；下层模型以系统成本最小为目标，确定各个火电机组出力。通过实际算例对比柔性负荷优化前后系统总成本，验证所提调度方法的经济性和有效性。

Abstract:

Large-scale wind power integration brings great challenges to system regulation. In order to solve the problems of wind abandonment due to the insufficient system regulation ability, a method of source and load hierarchical optimization dispatch for deep peak shaving considering flexible load is proposed. This method is divided into two optimization models: the upper layer and the lower layer. The upper layer aims to minimize the peak-valley difference of the system to reduce system peak shaving pressure, and the lower layer model aims to minimize the system cost, including the cost of thermal power and wind abandonment costs,and define the thermal power output. The total system cost with and without the improved flexible load optimization dispatch methods are compared. Finally, an actual example is used to verify the economy and effectiveness of the proposed dispatch method.