计及可中断负荷参与应急调度的备用容量优化配置方法

Reserve Optimization with Interruptible Load Participation in Emergency Dispatch

新能源大规模并网增加了电网频率失稳的风险。针对大功率缺失下的频率安全问题,提出1种计及可中断负荷参与应急调度的备用容量优化配置方法。相较于传统的备用容量优化方案,所提方法考虑应急调度过程中常规机组和可中断负荷的响应时间和爬坡速率,构建考虑分段频率下限值约束的应急备用容量优化模型,以提高电网的应急处理能力。算例分析表明,所提方法能够兼顾电力系统经济调度和频率稳定目标,提高电网安全经济运行水平。

The high renewable energy penetration in power system will increase the risk of frequency excursions.A reserve optimization formulation is proposed for emergency dispatch with the participation of interruptible loads in the event of significant power loss.Compared with the traditional reserve capacity optimization scheme,the proposed method considers the response time and ramp rate of conventional units and interruptible loads in the emergency dispatch process,and constructs an emergency reserve optimization model considering the lower limit constraint of segmented frequency so as to enhance the emergency disposal capability of the power system.Numerical results show that the proposed model can effectively achieve the economic dispatch and frequency stability objectives of the power system.