Day-Ahead Robust Optimal Scheduling of Hydro-Wind-PV-Storage Complementary System Considering the Steadiness of Power Delivery
Guo Yi1, Ming Bo1, Huang Qiang1, Wang Yimin1, Li Yunlong2
1. State Key Laboratory of Eco-hydraulics in Northwest Arid Region of China Xi'an University of Technology Xi'an 710048 China; 2. Power China Northwest Engineering Corporation Limited Xi'an 710065 China
Abstract:Complementary operation and bundled delivery of large-scale hydro-wind-photovoltaic (PV)-storage systems is an important way to promote new energy consumption. The distribution of power sources and load demand is uneven in China, and UHV DC is usually applied to transmit the clean electricity from western regions to the eastern load center. However, decision variables of the optimal scheduling model for traditional complementary systems are generally the power output of adjustable power sources. This makes it difficult to satisfy the steady requirement of UHV DC power delivery, particularly for systems including cascade hydropower plants with complex hydraulic connections. Meanwhile, the day-ahead generation scheduling of the complementary system need to address forecast uncertainties of the wind and PV power. To address these issues, this paper proposes a day-ahead robust generation scheduling approach for hydro-wind-PV-storage complementary systems while considering the steady requirement of power delivery. Firstly, scenario generation (Latin Hypercube Sampling) and scenario reduction (Simultaneous Backward Reduction) methods are used to obtain the representative scenarios of wind and PV power output to characterize their forecast uncertainties. Then, considering the electricity production and peak-shaving performance of the system, a day-ahead multi-objective robust optimization scheduling model for the hydro-wind-PV-storage complementary systems is established. Finally, a two-layer nested optimization framework is developed to solve this model. In the outer layer, an intelligent algorithm based on a two-dimensional encoding strategy is used to optimize the delivered power of the system, which ensure the steadiness of power delivery and reduce the number of the decision variables. In the inner layer, under the given delivered power, discriminant coefficient and relative water storage rate are applied to determine the load dispatch strategies among cascade hydropower plants and state of charge of battery storage plants. In this model, the derived day-ahead generation schedule can ensure the steady requirement of power delivery, and give full play the flexibility of cascade hydropower and battery storage plants and reduce the effects of forecast uncertainties of wind and PV power. “Qinghai-Henan” UHV DC project in clean energy base of the upper Yellow river basin is selected as a case study. Results show that the formulated power delivery curves presents a stair-shape, and the power in each operation stage is steady, which satisfies the steady requirement of power delivery. The output of the complementary system can track the load demand variation as much as possible to enhance the peak shaving performance of the system. The standard deviation of residual load decreases by 44%, 13.3%, 25% and 46% respectively in each typical day. Although the generation schedule with better electricity production and peak-shaving performance can be obtained by deterministic optimization model, it is difficult to cope with the forecast uncertainties of wind and PV power, while robust optimization model can effectively utilize the flexibility of cascade hydropower and battery storage, and avoid the electricity curtailment and power shortage risk of the system. Comparisons of different battery storage configuration ratio show that the operation performance of the complementary system increases with the increase of battery storage configuration ratio, especially for peak-shaving performance. Finally, based on the characteristics of battery storage operation in each season, the joint operation strategy of cascade hydropower and battery storage is proposed to maintain the flexibility of battery storage and the sustainable operation of the hydro-wind-PV-storage complementary system. The following conclusions can be drawn: (1) the proposed day-ahead robust generation scheduling approach for hydro-wind-PV-storage complementarity systems can satisfy the steady requirement of UHV DC power delivery; (2) the proposed approach can effectively cope with the forecast uncertainties of wind and PV power, and avoid the electricity curtailment and power shortage risk of the system; and (3) the proposed joint operation strategy can effectively maintain the flexibility of hydro-wind-PV-storage complementary system.
郭怿, 明波, 黄强, 王义民, 李运龙. 考虑输电功率平稳性的水-风-光-储多能互补日前鲁棒优化调度[J]. 电工技术学报, 2023, 38(9): 2350-2363.
Guo Yi, Ming Bo, Huang Qiang, Wang Yimin, Li Yunlong. Day-Ahead Robust Optimal Scheduling of Hydro-Wind-PV-Storage Complementary System Considering the Steadiness of Power Delivery. Transactions of China Electrotechnical Society, 2023, 38(9): 2350-2363.
[1] 习近平. 在第七十五届联合国大会一般性辩论上的讲话[EB/OL]. [2020-09-22]. http://www.gov.cn/xinwen/2020-09/22/content_5546168.htm. [2] Mallapaty S.How China could be carbon neutral by mid-century[J]. Nature, 2020, 586(7830): 482-483. [3] 武平, 郭巍, 晋春杰, 等. 浅谈我国电力与能源现状及解决途径[J]. 电气技术, 2018, 19(5): 1-4, 14. Wu Ping, Guo Wei, Jin Chunjie, et al.Analysis on the current situation of electricity and energy in China and its solution[J]. Electrical Engineering, 2018, 19(5): 1-4, 14. [4] 姜云鹏, 任洲洋, 李秋燕, 等. 考虑多灵活性资源协调调度的配电网新能源消纳策略[J]. 电工技术学报, 2022, 37(7): 1820-1835. Jiang Yunpeng, Ren Zhouyang, Li Qiuyan, et al.An accommodation strategy for renewable energy in distribution network considering coordinated dispatching of multi-flexible resources[J]. Transactions of China Electrotechnical Society, 2022, 37(7): 1820-1835. [5] 畅建霞, 王义民, 黄强, 等. 水电与风电联合补偿调度机理研究与应用[J]. 水力发电学报, 2014, 33(3): 68-73, 80. Chang Jianxia, Wang Yimin, Huang Qiang, et al.Compensation operation mechanism of hydropower plant and wind power plant[J]. Journal of Hydroelectric Engineering, 2014, 33(3): 68-73, 80. [6] 易文飞, 张艺伟, 曾博, 等. 多形态激励型需求侧响应协同平衡可再生能源波动的鲁棒优化配置[J]. 电工技术学报, 2018, 33(23): 5541-5554. Yi Wenfei, Zhang Yiwei, Zeng Bo, et al.Robust optimization allocation for multi-type incentive-based demand response collaboration to balance renewable energy fluctuations[J]. Transactions of China Electrotechnical Society, 2018, 33(23): 5541-5554. [7] Guo Yi, Ming Bo, Huang Qiang, et al.Risk-averse day-ahead generation scheduling of hydro-wind-photovoltaic complementary systems considering the steady requirement of power delivery[J]. Applied Energy, 2022, 309: 118467. [8] 程春田. 碳中和下的水电角色重塑及其关键问题[J]. 电力系统自动化, 2021, 45(16): 29-36. Cheng Chuntian.Function remolding of hydropower systems for carbon neutral and its key problems[J]. Automation of Electric Power Systems, 2021, 45(16): 29-36. [9] 叶晨, 王蓓蓓, 薛必克, 等. 考虑超售的共享分布式光储混合运营模式协同策略研究[J]. 电工技术学报, 2022, 37(7): 1836-1846. Ye Chen, Wang Beibei, Xue Bike, et al.Study on the coordination strategy of sharing distributed photovoltaic energy storage hybrid operation mode considering overselling[J]. Transactions of China Electrotechnical Society, 2022, 37(7): 1836-1846. [10] Braff W A, Mueller J M, Trancik J E.Value of storage technologies for wind and solar energy[J]. Nature Climate Change, 2016, 6(10): 964-969. [11] Siddaiah R, Saini R P.A review on planning, configurations, modeling and optimization techniques of hybrid renewable energy systems for off grid applications[J]. Renewable and Sustainable Energy Reviews, 2016, 58: 376-396. [12] 国家发展改革委,国家能源局. 关于推进电力源网荷储一体化和多能互补发展的指导意见[Z]. 2021. [13] 罗仕华, 胡维昊, 黄琦, 等. 市场机制下光伏/小水电/抽水蓄能电站系统容量优化配置[J]. 电工技术学报, 2020, 35(13): 2792-2804. Luo Shihua, Hu Weihao, Huang Qi, et al.Optimization of photovoltaic/small hydropower/pumped storage power station system sizing under the market mechanism[J]. Transactions of China Electrotechnical Society, 2020, 35(13): 2792-2804. [14] 朱燕梅, 陈仕军, 马光文, 等. 计及发电量和出力波动的水光互补短期调度[J]. 电工技术学报, 2020, 35(13): 2769-2779. Zhu Yanmei, Chen Shijun, Ma Guangwen, et al.Short-term complementary operation of hydro-photovoltaic integrated system considering power generation and output fluctuation[J]. Transactions of China Electrotechnical Society, 2020, 35(13): 2769-2779. [15] 苏承国. 大规模清洁能源接入下电网调峰问题研究[D]. 大连: 大连理工大学, 2019. [16] Su Chengguo, Cheng Chuntian, Wang Peilin, et al.Optimization model for the short-term operation of hydropower plants transmitting power to multiple power grids via HVDC transmission lines[J]. IEEE Access, 2019, 7: 139236-139248. [17] 崔杨, 程广岩, 仲悟之, 等. 计及受端电网调峰趋势的风-光-火特高压直流外送调度方法[J]. 太阳能学报, 2021, 42(8): 32-40. Cui Yang, Cheng Guangyan, Zhong Wuzhi, et al.Wind-photovoltaic-fire UHV DC external dispatching method considering peaking trend of power grid[J]. Acta Energiae Solaris Sinica, 2021, 42(8): 32-40. [18] 贺元康, 刘瑞丰, 陈天恩, 等. 全清洁能源特高压青豫直流初期打捆外送模式[J]. 中国电力, 2021, 54(7): 83-92. He Yuankang, Liu Ruifeng, Chen Tianen, et al.Exploration of bundled transaction model for all clean energy transmission of Qing-Yu UHV DC project[J]. Electric Power, 2021, 54(7): 83-92. [19] 闻昕, 孙圆亮, 谭乔凤, 等. 考虑预测不确定性的风-光-水多能互补系统调度风险和效益分析[J]. 工程科学与技术, 2020, 52(3): 32-41. Wen Xin, Sun Yuanliang, Tan Qiaofeng, et al.Risk and benefit analysis of hydro-wind-solar multi-energy system considering the one-day ahead output forecast uncertainty[J]. Advanced Engineering Sciences, 2020, 52(3): 32-41. [20] 明波. 大规模水光互补系统全生命周期协同运行研究[D]. 武汉: 武汉大学, 2019. [21] Yang Yuqi, Zhou Jianzhong, Liu Guangbiao, et al.Multi-plan formulation of hydropower generation considering uncertainty of wind power[J]. Applied Energy, 2020, 260: 114239. [22] Liu Benxi, Lund J R, Liao Shengli, et al.Optimal power peak shaving using hydropower to complement wind and solar power uncertainty[J]. Energy Conversion and Management, 2020, 209: 112628. [23] Zhu Feilin, Zhong Pingan, Xu Bin, et al.Short-term stochastic optimization of a hydro-wind-photovoltaic hybrid system under multiple uncertainties[J]. Energy Conversion and Management, 2020, 214: 112902. [24] Ben-Tal A, Nemirovski A.Robust optimization - methodology and applications[J]. Mathematical Programming, 2002, 92(3): 453-480. [25] 彭春华, 谢鹏, 陈臣. 大规模光伏电站接入电网可调节鲁棒优化调度[J]. 中国电机工程学报, 2014, 34(25): 4324-4332. Peng Chunhua, Xie Peng, Chen Chen.Adjustable robust optimal dispatch of power system with large-scale photovoltaic power stations[J]. Proceedings of the CSEE, 2014, 34(25): 4324-4332. [26] 叶畅, 苗世洪, 李姚旺, 等. 基于改进不确定边界的主动配电网鲁棒优化调度[J]. 电工技术学报, 2019, 34(19): 4084-4095. Ye Chang, Miao Shihong, Li Yaowang, et al.Robust optimal scheduling for active distribution network based on improved uncertain boundary[J]. Transactions of China Electrotechnical Society, 2019, 34(19): 4084-4095. [27] 叶畅, 曹侃, 丁凯, 等. 基于广义储能的多能源系统不确定优化调度策略[J]. 电工技术学报, 2021, 36(17): 3753-3764. Ye Chang, Cao Kan, Ding Kai, et al.Uncertain optimal dispatch strategy based on generalized energy storage for multi-energy system[J]. Transactions of China Electrotechnical Society, 2021, 36(17): 3753-3764. [28] 彭春华, 郑聪, 陈婧, 等. 基于置信间隙决策的综合能源系统鲁棒优化调度[J]. 中国电机工程学报, 2021, 41(16): 5593-5603. Peng Chunhua, Zheng Cong, Chen Jing, et al.Robust optimal dispatching of integrated energy system based on confidence gap decision[J]. Proceedings of the CSEE, 2021, 41(16): 5593-5603. [29] Lu Lu, Yuan Wenlin, Su Chengguo, et al.Optimization model for the short-term joint operation of a grid-connected wind-photovoltaic-hydro hybrid energy system with cascade hydropower plants[J]. Energy Conversion and Management, 2021, 236: 114055. [30] Tan Qiaofeng, Wen Xin, Sun Yuanliang, et al.Evaluation of the risk and benefit of the complementary operation of the large wind-photovoltaic-hydropower system considering forecast uncertainty[J]. Applied Energy, 2021, 285: 116442. [31] 明波, 李研, 刘攀, 等. 嵌套短期弃电风险的水光互补中长期优化调度研究[J]. 水利学报, 2021, 52(6): 712-722. Ming Bo, Li Yan, Liu Pan, et al.Long-term optimal operation of hydro-solar hybrid energy systems nested with short-term energy curtailment risk[J]. Journal of Hydraulic Engineering, 2021, 52(6): 712-722. [32] Ming Bo, Liu Pan, Guo Shenglian, et al.Robust hydroelectric unit commitment considering integration of large-scale photovoltaic power: a case study in China[J]. Applied Energy, 2018, 228: 1341-1352. [33] Zhang Yu, Li Yanting, Zhang Guangyao.Short-term wind power forecasting approach based on Seq2Seq model using NWP data[J]. Energy, 2020, 213: 118371. [34] 刘嘉诚, 刘俊, 赵宏炎, 等. 基于DKDE与改进mRMR特征选择的短期光伏出力预测[J]. 电力系统自动化, 2021, 45(14): 13-21. Liu Jiacheng, Liu Jun, Zhao Hongyan, et al.Short-term photovoltaic output forecasting based on diffusion kernel density estimation and improved max-relevance and Min-redundancy feature selection[J]. Automation of Electric Power Systems, 2021, 45(14): 13-21. [35] 潘超, 李润宇, 蔡国伟, 等. 基于时空关联分解重构的风速超短期预测[J]. 电工技术学报, 2021, 36(22): 4739-4748. Pan Chao, Li Runyu, Cai Guowei, et al.Multi-step ultra-short-term wind speed prediction based on decomposition and reconstruction of time-spatial correlation[J]. Transactions of China Electrotechnical Society, 2021, 36(22): 4739-4748. [36] 钟华昱, 黄强, 明波, 等. 耦合集合预报信息的水库高效调度方法研究[J]. 水力发电学报, 2021, 40(5): 44-55. Zhong Huayu, Huang Qiang, Ming Bo, et al.An efficient method for deriving reservoir operating rules by coupling ensemble forecasting information[J]. Journal of Hydroelectric Engineering, 2021, 40(5): 44-55. [37] 胡学东. 梯级水电站群负荷分配方法及蓄能调度图的研究[D]. 武汉: 华中科技大学, 2017. [38] Peng Chunhua, Sun Huijuan, Guo Jianfeng.Multi-objective optimal PMU placement using a non-dominated sorting differential evolution algorithm[J]. International Journal of Electrical Power & Energy Systems, 2010, 32(8): 886-892. [39] Qasem S N, Shamsuddin S M.Memetic elitist Pareto differential Evolution algorithm based radial basis function networks for classification problems[J]. Applied Soft Computing, 2011, 11(8): 5565-5581.