风光对水电调峰能力的影响初探:基于调峰幅度的角度

Preliminary study on the impact of wind and PV integration on hydroelectric peak shaving capacity:Based on amplitude of peak-shaving

水风光互补是当前能源行业的研究潮流和方向,但风光出力的不稳定性和不可控性势必会影响水电站调峰能力的发挥。本研究旨在从调峰幅度角度为水电调峰能力评估及风光并入后对其的影响量化提供一种参考思路。首先提出了周期调节幅度、最大时段调节幅度、时段累计调节幅度以及水电站综合调峰幅度4个指标来评估水电站调峰状况,其次构建了水风光互补运行模型,并通过有无风光工况下4个指标的变化率来量化风光对水电调峰幅度的影响。通过某电网调峰梯级水电及其周边风光资源的多场景模拟计算得出,相比无风光场景,风电和光伏对单个指标的影响趋势不同,但无论是风电还是光伏,接入系统后,梯级水电都须发挥更大的综合调峰幅度才能调节消纳风光。结果表明,风光接入会给水电调峰带来不利影响,并且该影响具有累积效应。

Hydro-wind-PV complementarity is the current trend and direction of research in the energy industry,but the instability and uncontrollability of wind-PV output will inevitably affect the peak shaving capacity of hydropower plants.Based on amplitude of peak-shaving,this study aims to provide a reference idea for the assessment of hydropower peaking capacity and the quantification of the impact on it after wind-PV integration.In this study,we firstly proposed four indicators to evaluate the peak adjustment status of hydropower plants:the cycle amplitude of peak-shaving,the maximum time period amplitude of peak-shaving,the cumulative time period amplitude of peak-shaving,and the comprehensive amplitude of peak-shaving.Secondly,a hydrowind-PV complementary operation model is constructed,and the impact of wind and PV power on hydropower peaking amplitude is quantified by the rate of change of four indicators under operating conditions with and without the two new energies.Multi-scenario simulations of hydropower and its neighboring wind and PV resources show different trends in the impact of wind and PV on individual metrics compared to the no-wind/PV scenario.But whether wind power or PV power accesses to the system,hydropower plants must play a greater integrated peak amplitude in order to regulate and accommodate wind and PV power.It is shown that wind and PV integration can adversely affect hydropower peak shaving capacity and that this impact has a cumulative effect.