面向多能协同园区的能源综合利用率指标

考虑综合能源系统多能流特性及可再生能源接入影响,提出适用于多能协同园区能效评估的能源综合利用率指标。该指标可综合反映园区对可再生能源的消纳率及不可再生能源的利用水平,体现综合能源系统低碳、高效的核心特点。分析比较了所提指标与其他能效指标的区别,讨论了不同目标对调度策略的影响。算例结果表明,相比于传统一次能源利用率的直接推广,该指标能更准确地体现园区多能联供、能量梯级利用的优势。同时,通过适当调整电价,成本最低与能源综合利用率最高的调度结果将趋于一致,反映了为促进可再生能源消纳,减少非可再生一次能源耗量,合理定价的必要性。

Comprehensive energy utilization rate for park-level integrated energy system

With the consideration of the multiple energy flows of integrated energy system and the impact of renewable energy integration, an index named comprehensive energy utilization rate is put forward for the park-level integrated energy system, which comprehensively evaluates the renewable energy accommodation rate and the non-renewable energy utilization level of the park to reflect the low-carbon high-efficiency features of integrated energy system. The differences between the proposed index and other energy-efficiency indicators are analyzed and the impacts of different targets on the dispatch strategy are discussed. The results of case study show that, compared with the direct promotion of traditional energy utilization rate, the proposed index reflects more accurately the park-level advantages in multi-energy supply and cascaded energy utilization. Furthermore, the difference of dispatch results between the lowest cost objective and the highest energy utilization rate objective can be diminished by the appropriate adjustment of electricity price, which shows the reasonable pricing is necessary for promoting the renewable energy accommodation and reducing the non-renewable energy consumption.