考虑多能互补的电力电量平衡优化调度策略

Optimal Dispatch Strategy of Power and Electricity Balance Based on Multi-Energy Complementation

充分发挥不同发电能源和储能设备之间的协同互补潜力,可以缓解高比例可再生能源电力系统中可再生能源出力的波动性给系统电力电量平衡带来的巨大压力。为此,提出了一种考虑多能互补的电力电量平衡优化调度策略。该方法可实现不同时间尺度下的多能互补,提高系统整体运行性能。首先,考虑新能源出力季节性和短期波动特征,兼顾中长期电量平衡和短时电力平衡,建立系统多时间尺度双层优化调度模型;其次,通过对混合储能系统充放电策略的优化,实现多种储能的互补协调,提高系统运行经济性;最后,利用修改的IEEE-RTS 1979标准算例系统验证所提方法的有效性,验证了不同时间尺度的能源互补和不同储能设备的协调配合,在保证系统平衡的同时,提升系统的经济效益。

In the modern power system with high penetration of renewable power generation,giving full play to the potential of coordinative and complementary operations between different power generation sources and different energy storage equipments,can alleviate the huge stress on the system's power and electricity balance caused by the volatility of new energy output.This paper proposes an optimal scheduling strategy for power and electricity balance considering multi-energy complementation,such that multi-energy dispatch is coordinated under different time scales and hence the overall operating performance of the system can be improved.First,according to the seasonal and short-term fluctuation characteristics of new energy output,by taking into account the medium and long-term electricity balance as well as short-term power balance,the multi-time scale double-layer optimal scheduling system model is established.Then,through the optimization of the charging and discharging strategy of the hybrid energy storage system,the operation of multiple energy storages is coordinated efficiently and the economic benefit of system operation can be boosted.Finally,case studies are performed to verify the effectiveness of the proposed method on the modified IEEE-RTS 1979 system model.The results indicate that the energy complementation of different time scales and the coordination of different energy storage equipment can be applied to improve the economic benefits of the system while maintaining system power balance.