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工程科学与技术:2021,53(3):142-149
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水光互补日内优化运行策略
(1.四川大学 水力学与山区河流开发保护重点实验室,四川 成都 610065;2.四川大学 水利水电学院,四川 成都 610065;3.四川大学 商学院,四川 成都 610065;4.国网四川省电力公司,四川 成都 610041)
Intra-day Optimal Operation Strategy of Hydro-PV Hybrid System
(1.State Key Lab. of Hydraulics and Mountain River Eng., Sichuan Univ., Chengdu 610065, China;2.College of Water Resource & Hydropower, Sichuan Univ., Chengdu 610065, China;3.Business School, Sichuan Univ., Chengdu 610065, China;4.State Grid Sichuan Electric Power Co., Chengdu 610041, China)
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投稿时间:2020-07-20    修订日期:2021-04-16
中文摘要: 针对光伏发电功率不可控、随机性强等特征引起的水光互补系统中复杂梯级水电运行策略难以制定的问题,探讨了光伏出力的波动特性对水电运行方式的影响,并提出了一种以波动电量比为目标的水光互补日内协调优化运行策略。首先,建立了描述光伏出力局部特性和全局特性的指标体系,并基于该指标体系采用聚类方法对光伏出力场景进行缩减;其次,提出了计及发电量和出力波动双重目标的波动电量比指标,并以该指标为目标函数构建了优化模型;第三,结合光伏出力的固有变化特性,提出一种基于Sigmoid函数的PSO算法进行模型求解;最后,以四川省某流域串并联混合开发的梯级小水电站群及其周边光伏发电组成的互补系统为例进行了案例研究。优化结果显示:晴天、多云和阴雨3种天气场景下,水光互补后出力波动均在1 MW以内,波动电量比均在0.05%以内;与水电单独优化相比,光伏发电的接入提升了梯级水库群的库容利用率;表明所建模型科学合理,所提算法性能优良。在调节光伏后,梯级水电的日内优化运行策略是:在光伏出力尚小时先泄水发电,随着光伏出力的逐渐增大,水库群逐步蓄水,并在进入光伏不可发电时段前后开始泄水,以补足光伏的间歇性,直至到达日末水位。
中文关键词: 水电  光伏发电  互补  策略  聚类分析  粒子群算法
Abstract:In order to solve the problem that operation strategy of hydro-photovoltaic (PV) hybrid system is difficult to operate due to the uncontrollability and strong randomness of PV output, an intra-day optimal operation strategy with the index of fluctuating power ratio was proposed on the basis of influence analysis of PV output’s fluctuation characteristics on hydropower’s operation mode. First, an index system to describe both local and global characteristics of PV output was established, based on which the PV output scenarios were created by cluster analysis method. Then, considering both electric energy production and output fluctuation of the hybrid system, a new index named fluctuating power ratio was proposed, with which an optimized model was established. Third, combined with PV output characteristics, a particle swarm optimization (PSO) algorithm based on sigmoid function was proposed to solve the model. Finally, a case study was carried out for a series of small-scale hydropower stations developed in series and in parallel in a river basin in Sichuan Province. The results showed that the fluctuating power ratios in sunny, cloudy, and rainy days were within 0.05% after the complementary operation; compared with the optimization of hydropower alone, the access of PV improved the utilization rate of cascade reservoirs; and the proposed algorithm and model were proved to be feasible and scientific. It was demonstrated that the intra-day optimal operation strategy of hydropower in the hydro-PV hybrid system was as follows: The reservoirs discharged water to generate electricity while the PV output was small, then gradually stored water with the increased of the PV output, and started to discharge around the non-power generation period of PV until reaching the water stage at the end of the day.
文章编号:202000603     中图分类号:TM612;TM615    文献标志码:
基金项目:国家重点研发计划项目(2018YFB0905204)
作者简介:第一作者:朱燕梅(1993-),女,博士生.研究方向:多能互补调度及电力市场.E-mail:507109510@qq.com;通信作者:陈仕军,E-mail:fjnpcsj@126.com
引用文本:
朱燕梅,黄炜斌,陈仕军,马光文,韩晓言.水光互补日内优化运行策略[J].工程科学与技术,2021,53(3):142-149.
ZHU Yanmei,HUANG Weibin,CHEN Shijun,MA Guangwen,HAN Xiaoyan.Intra-day Optimal Operation Strategy of Hydro-PV Hybrid System[J].Advanced Engineering Sciences,2021,53(3):142-149.