Article(id=1154428732354847253, tenantId=1146029695717560320, journalId=1146119893612605453, issueId=1154428727883714760, articleNumber=null, orderNo=null, doi=null, pmid=null, cstr=null, oa=null, hot=null, price=null, onlineType=0, articleFormat=0, articleType=null, articleTypeStr=null, receivedDate=1684166400000, receivedDateStr=2023-05-16, revisedDate=null, revisedDateStr=null, acceptedDate=null, acceptedDateStr=null, onlineDate=1753166858041, onlineDateStr=2025-07-22, pubDate=1732032000000, pubDateStr=2024-11-20, doiRegisterDate=null, doiRegisterDateStr=null, onlineIssueDate=1753166858041, onlineIssueDateStr=2025-07-22, onlineJustAcceptDate=null, onlineJustAcceptDateStr=null, onlineFirstDate=null, onlineFirstDateStr=null, sourceXml=null, magXml=null, createTime=1753166858041, creator=13701087609, updateTime=1753166858041, updator=13701087609, issue=Issue{id=1154428727883714760, tenantId=1146029695717560320, journalId=1146119893612605453, year='2024', volume='42', issue='11', pageStart='1420', pageEnd='1562', issueExtLink='null', onlineDate='null', pubDate='null', beforeIssueId=null, nextIssueId=null, price=null, status=1, issueComplete=1, articleOrder=1, issueType=-1, specialIssue=null, createTime=1753166856976, creator=13701087609, updateTime=1753694530898, updator=13701087609, preIssue=null, nextIssue=null, ext={EN=IssueExt(id=1156641952767533916, tenantId=1146029695717560320, journalId=1146119893612605453, issueId=1154428727883714760, language=EN, specialIssueTitle=, coverIllustrator=, specialIssueEditor=, specialIssueAbout=), CN=IssueExt(id=1156641952767533917, tenantId=1146029695717560320, journalId=1146119893612605453, issueId=1154428727883714760, language=CN, specialIssueTitle=, coverIllustrator=, specialIssueEditor=, specialIssueAbout=)}, issueFiles=null}, startPage=1511, endPage=1518, ext={EN=ArticleExt(id=1154428732841386520, articleId=1154428732354847253, tenantId=1146029695717560320, journalId=1146119893612605453, language=EN, title=Operation and capacity configuration of energy storage for photovoltaic power station with a high capacity ratio, columnId=null, journalTitle=Renewable Energy Resources, columnName=null, runingTitle=null, highlight=null, articleAbstract=

With the development of photovoltaic(PV) industry, high capacity ratios have gradually become popular in the PV power station. To find the optimal charging/discharge strategy of energy storage (ES) in PV subarray with a high capacity ratio, one operation strategy based on working mode recognition was proposed to coordinate two competitive objectives—load shifting and smoothing. Furthermore, a capacity configuration model with the objectives of life cycle net present value maximization and output fluctuation minimization was constructed considering the generation income, ES cost, fluctuation characteristics, and typical day type. Moreover, taking a 1 MW subarray with 1.8 capacity ratio in a northeast utilityscale PV power station as a case, the optimal capacity of 700 kW·h was obtained. The simulation results under different typical days verified the feasibility and the effectiveness of the proposed ES operation strategy as well as the configuration model.

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随着光伏产业的不断发展,高容配比逐步成为光伏电站设计的主流趋势。针对高容配比子阵内部储能优化充、放电策略的问题,文章提出了一种基于工作模式识别的储能运行方式,以实现能量搬移和平抑波动两种非协同的工作目标。综合考虑光伏储能联合系统的发电收益、储能成本、波动特性、典型日类别等信息,构建了以全生命周期净现值最大和平抑波动效果最优为目标的储能容量优化配置数学模型。以东北某大型光伏电站1.8容配比的1MW光伏子阵作为案例研究对象,优化得到的最佳储能容量为700kW·h。不同典型日的仿真结果表明,文章所提出的储能运行方式及配置模型可行有效。

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马超(1981-),男,博士,教授,研究方向为清洁能源协同开发与高效利用。E-mail: 。
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Xining 810008 China), AuthorCompanyExt(id=1154428769235362724, tenantId=1146029695717560320, journalId=1146119893612605453, articleId=1154428732354847253, companyId=1154428769222779810, language=CN, country=null, province=null, city=null, postcode=null, companyName=null, departmentName=null, remark=2 青海黄河上游水电开发有限责任公司 青海 西宁 810008)]), AuthorCompany(id=1154428769294082982, tenantId=1146029695717560320, journalId=1146119893612605453, articleId=1154428732354847253, xref=3, ext=[AuthorCompanyExt(id=1154428769302471591, tenantId=1146029695717560320, journalId=1146119893612605453, articleId=1154428732354847253, companyId=1154428769294082982, language=EN, country=null, province=null, city=null, postcode=null, companyName=null, departmentName=null, remark=3 State Key Laboratory of Hydraulic Engineering Simulation and Safety Tianjin University Tianjin 300072 China), AuthorCompanyExt(id=1154428769306665896, tenantId=1146029695717560320, journalId=1146119893612605453, articleId=1154428732354847253, companyId=1154428769294082982, language=CN, country=null, province=null, city=null, postcode=null, companyName=null, departmentName=null, remark=3 天津大学 水利工程仿真与安全国家重点实验室 天津 300072)])], figs=[ArticleFig(id=1154428772234290140, tenantId=1146029695717560320, journalId=1146119893612605453, articleId=1154428732354847253, language=EN, label=Fig. 1, caption=Typical structure of PV/ES combined power generation system, figureFileSmall=2d/HaVFTpfIx+Cy6cz18XA==, figureFileBig=1lNvhUYJ1hhsp0ZargXHiw==, tableContent=null), ArticleFig(id=1154428772305593309, tenantId=1146029695717560320, journalId=1146119893612605453, articleId=1154428732354847253, language=CN, label=图 1, caption=光伏储能联合发电系统典型结构, figureFileSmall=2d/HaVFTpfIx+Cy6cz18XA==, figureFileBig=1lNvhUYJ1hhsp0ZargXHiw==, tableContent=null), ArticleFig(id=1154428772368507870, tenantId=1146029695717560320, journalId=1146119893612605453, articleId=1154428732354847253, language=EN, label=Fig. 2, caption=Flow chart of ES operation, figureFileSmall=LJpDFdEG+i9lw+GbPpSZLQ==, figureFileBig=nkDMGI3e1dAhCf+F4mt3fA==, tableContent=null), ArticleFig(id=1154428772435616735, tenantId=1146029695717560320, journalId=1146119893612605453, articleId=1154428732354847253, language=CN, label=图 2, caption=储能运行流程图, figureFileSmall=LJpDFdEG+i9lw+GbPpSZLQ==, figureFileBig=nkDMGI3e1dAhCf+F4mt3fA==, tableContent=null), ArticleFig(id=1154428772511114209, tenantId=1146029695717560320, journalId=1146119893612605453, articleId=1154428732354847253, language=EN, label=Fig. 3, caption=Unlimited output process of PV subarray under typical weather conditions, figureFileSmall=dbH46n8PoC8fV0CPtxaddQ==, figureFileBig=pdR/NHevprqSPO3fl6Q1fw==, tableContent=null), ArticleFig(id=1154428772569834467, tenantId=1146029695717560320, journalId=1146119893612605453, articleId=1154428732354847253, language=CN, label=图 3, caption=典型天气下光伏子阵不限电出力过程, figureFileSmall=dbH46n8PoC8fV0CPtxaddQ==, figureFileBig=pdR/NHevprqSPO3fl6Q1fw==, tableContent=null), ArticleFig(id=1154428772641137637, tenantId=1146029695717560320, journalId=1146119893612605453, articleId=1154428732354847253, language=EN, label=Fig. 4, caption=Power generation of PV/ES system under different ES configurations, figureFileSmall=rr6eBCv2/aZSHHNFOZMfRA==, figureFileBig=vkUlG5MobZCDg8MW11C8Kg==, tableContent=null), ArticleFig(id=1154428772691469288, tenantId=1146029695717560320, journalId=1146119893612605453, articleId=1154428732354847253, language=CN, label=图 4, caption=不同储能配置下的光伏储能系统发电量, figureFileSmall=rr6eBCv2/aZSHHNFOZMfRA==, figureFileBig=vkUlG5MobZCDg8MW11C8Kg==, tableContent=null), ArticleFig(id=1154428772754383849, tenantId=1146029695717560320, journalId=1146119893612605453, articleId=1154428732354847253, language=EN, label=Fig. 5, caption=Objectives under different ES configurations, figureFileSmall=Lg+3PqwFVen3HpsHgsfuzA==, figureFileBig=BjMpTw2bDxLX6ndmDSbGGg==, tableContent=null), ArticleFig(id=1154428772813104107, tenantId=1146029695717560320, journalId=1146119893612605453, articleId=1154428732354847253, language=CN, label=图 5, caption=不同储能配置下的目标函数, figureFileSmall=Lg+3PqwFVen3HpsHgsfuzA==, figureFileBig=BjMpTw2bDxLX6ndmDSbGGg==, tableContent=null), ArticleFig(id=1154428772884407277, tenantId=1146029695717560320, journalId=1146119893612605453, articleId=1154428732354847253, language=EN, label=Fig. 6, caption=Wavelet decomposition and mode identification, figureFileSmall=C4J5hFDlrm5rdeF4DezoOA==, figureFileBig=Sf3DXwoNdHtPDQSYpP4mLw==, tableContent=null), ArticleFig(id=1154428773027013615, tenantId=1146029695717560320, journalId=1146119893612605453, articleId=1154428732354847253, language=CN, label=图 6, caption=小波分解以及模式识别, figureFileSmall=C4J5hFDlrm5rdeF4DezoOA==, figureFileBig=Sf3DXwoNdHtPDQSYpP4mLw==, tableContent=null), ArticleFig(id=1154428773081539568, tenantId=1146029695717560320, journalId=1146119893612605453, articleId=1154428732354847253, language=EN, label=Fig. 7, caption=Output process of PV/ES system, figureFileSmall=AwXh2dQczJSnhquk2IezcA==, figureFileBig=9w2U9+q8efp3bP9oGKQaQw==, tableContent=null), ArticleFig(id=1154428773131871218, tenantId=1146029695717560320, journalId=1146119893612605453, articleId=1154428732354847253, language=CN, label=图 7, caption=光伏储能系统出力过程, figureFileSmall=AwXh2dQczJSnhquk2IezcA==, figureFileBig=9w2U9+q8efp3bP9oGKQaQw==, tableContent=null), ArticleFig(id=1154428773203174388, tenantId=1146029695717560320, journalId=1146119893612605453, articleId=1154428732354847253, language=EN, label=Table 1, caption=Parameters of case study, figureFileSmall=null, figureFileBig=null, tableContent=
类别 参数 数值
光伏出力模型 温度系数 $a/\% \cdot {}^{ \circ }{\mathrm{C}}^{-1}$ 0.35
STC 光强 ${I}_{\mathrm{{STC}}}/\mathrm{W} \cdot {\mathrm{m}}^{-2}$ 1000
STC 背板温度 ${T}_{\mathrm{{STC}}}{/}^{ \circ }\mathrm{C}$ 25
光伏子阵 安装容量 ${P}_{\mathrm{{dc}}}/\mathrm{{kWp}}$ 1800
额定容量 ${P}_{\mathrm{{ac}}}/\mathrm{{kW}}$ 1000
容配比 ${R}_{\mathrm{{dc}}/\mathrm{{ac}}}$ 1.8
运行年限 ${N}_{v}/\mathrm{a}$ 25
储能 充、放电倍率/C 1
最大放电功率 $\overline{{P}_{\mathrm{{bat}}}}/\mathrm{{kW}}$ ${S}_{\text{cap }} \times 1$
最大充电功率 ${P}_{\mathrm{{bat}}}/\mathrm{{kW}}$ $- {S}_{\text{cap }} \times 1$
荷电状态上限 $\overline{\mathrm{{SOC}}}/\%$ 100
荷电状态下限 SOC/% 5
最大放电深度 ${DOD}/\%$ 95
日历寿命/a 15
自放电率 $\sigma /\% \cdot {\mathrm{{min}}}^{-1}$ 0
充、放电损耗系数 $\eta /\%$ 95
最大循环次数 ${N}_{\text{cycle }}$ 5000
荷电状态补偿系数 $\alpha /\% \cdot {\mathrm{{min}}}^{-1}$ 2
初始投资成本 ${C}_{s}^{\min }$ /元 $\cdot {\left( \mathrm{{kW}} \cdot \mathrm{h}\right) }^{-1}$ 800
置换成本 ${C}_{s}^{\mathrm{{re}}}$ /元 $\cdot {\left( \mathrm{{kW}} \cdot \mathrm{h}\right) }^{-1}$ 480
), ArticleFig(id=1154428773266088951, tenantId=1146029695717560320, journalId=1146119893612605453, articleId=1154428732354847253, language=CN, label=表 1, caption=算例参数, figureFileSmall=null, figureFileBig=null, tableContent=
类别 参数 数值
光伏出力模型 温度系数 $a/\% \cdot {}^{ \circ }{\mathrm{C}}^{-1}$ 0.35
STC 光强 ${I}_{\mathrm{{STC}}}/\mathrm{W} \cdot {\mathrm{m}}^{-2}$ 1000
STC 背板温度 ${T}_{\mathrm{{STC}}}{/}^{ \circ }\mathrm{C}$ 25
光伏子阵 安装容量 ${P}_{\mathrm{{dc}}}/\mathrm{{kWp}}$ 1800
额定容量 ${P}_{\mathrm{{ac}}}/\mathrm{{kW}}$ 1000
容配比 ${R}_{\mathrm{{dc}}/\mathrm{{ac}}}$ 1.8
运行年限 ${N}_{v}/\mathrm{a}$ 25
储能 充、放电倍率/C 1
最大放电功率 $\overline{{P}_{\mathrm{{bat}}}}/\mathrm{{kW}}$ ${S}_{\text{cap }} \times 1$
最大充电功率 ${P}_{\mathrm{{bat}}}/\mathrm{{kW}}$ $- {S}_{\text{cap }} \times 1$
荷电状态上限 $\overline{\mathrm{{SOC}}}/\%$ 100
荷电状态下限 SOC/% 5
最大放电深度 ${DOD}/\%$ 95
日历寿命/a 15
自放电率 $\sigma /\% \cdot {\mathrm{{min}}}^{-1}$ 0
充、放电损耗系数 $\eta /\%$ 95
最大循环次数 ${N}_{\text{cycle }}$ 5000
荷电状态补偿系数 $\alpha /\% \cdot {\mathrm{{min}}}^{-1}$ 2
初始投资成本 ${C}_{s}^{\min }$ /元 $\cdot {\left( \mathrm{{kW}} \cdot \mathrm{h}\right) }^{-1}$ 800
置换成本 ${C}_{s}^{\mathrm{{re}}}$ /元 $\cdot {\left( \mathrm{{kW}} \cdot \mathrm{h}\right) }^{-1}$ 480
), ArticleFig(id=1154428773333197818, tenantId=1146029695717560320, journalId=1146119893612605453, articleId=1154428732354847253, language=EN, label=Table 2, caption=Statistical results of typical daily operation, figureFileSmall=null, figureFileBig=null, tableContent=
典型日 天气类型 全年 占比/% 未配储能日发 电量/MW·h 未配储能弃 电量/MW·h 未配储能日内最大 出力波动 配置储能日发 电量/MW·h 配置储能弃 电量/MW·h 配置储能日内最大 出力波动 发电量提 升比例1%
晴天 39 9.67 3.06 0.97 10.26 2.42 1.36 6.03
多云 42 7.98 0.79 9.99 8.64 0.05 1.77 8.19
阴霾 9 1.67 0 4.53 1.65 0 1.27 -0.90
雨天 10 1.63 0 2.97 1.62 0 1.7 -0.38
), ArticleFig(id=1154428773396112381, tenantId=1146029695717560320, journalId=1146119893612605453, articleId=1154428732354847253, language=CN, label=表 2, caption=典型日运行统计结果, figureFileSmall=null, figureFileBig=null, tableContent=
典型日 天气类型 全年 占比/% 未配储能日发 电量/MW·h 未配储能弃 电量/MW·h 未配储能日内最大 出力波动 配置储能日发 电量/MW·h 配置储能弃 电量/MW·h 配置储能日内最大 出力波动 发电量提 升比例1%
晴天 39 9.67 3.06 0.97 10.26 2.42 1.36 6.03
多云 42 7.98 0.79 9.99 8.64 0.05 1.77 8.19
阴霾 9 1.67 0 4.53 1.65 0 1.27 -0.90
雨天 10 1.63 0 2.97 1.62 0 1.7 -0.38
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高容配比光伏电站储能运行方式及其容量配置研究
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庞秀岚 1, 2 , 徐希蒙 1 , 马超 1, 3
可再生能源 | 2024,42(11): 1511-1518
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可再生能源 | 2024, 42(11): 1511-1518
高容配比光伏电站储能运行方式及其容量配置研究
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庞秀岚1, 2, 徐希蒙1, 马超1, 3
作者信息
  • 1 天津大学 建筑工程学院 天津 300350
  • 2 青海黄河上游水电开发有限责任公司 青海 西宁 810008
  • 3 天津大学 水利工程仿真与安全国家重点实验室 天津 300072

通讯作者:

马超(1981-),男,博士,教授,研究方向为清洁能源协同开发与高效利用。E-mail: 。
Operation and capacity configuration of energy storage for photovoltaic power station with a high capacity ratio
Xiulan Pang1, 2, Ximeng Xu1, Chao Ma1, 3
Affiliations
  • 1 School of Civil Engineering Tianjin University Tianjin 300350 China
  • 2 Huanghe Hydropower Development Co., Ltd. Xining 810008 China
  • 3 State Key Laboratory of Hydraulic Engineering Simulation and Safety Tianjin University Tianjin 300072 China
出版时间: 2024-11-20
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随着光伏产业的不断发展,高容配比逐步成为光伏电站设计的主流趋势。针对高容配比子阵内部储能优化充、放电策略的问题,文章提出了一种基于工作模式识别的储能运行方式,以实现能量搬移和平抑波动两种非协同的工作目标。综合考虑光伏储能联合系统的发电收益、储能成本、波动特性、典型日类别等信息,构建了以全生命周期净现值最大和平抑波动效果最优为目标的储能容量优化配置数学模型。以东北某大型光伏电站1.8容配比的1MW光伏子阵作为案例研究对象,优化得到的最佳储能容量为700kW·h。不同典型日的仿真结果表明,文章所提出的储能运行方式及配置模型可行有效。

光伏  /  高容配比  /  储能  /  优化运行  /  容量配置

With the development of photovoltaic(PV) industry, high capacity ratios have gradually become popular in the PV power station. To find the optimal charging/discharge strategy of energy storage (ES) in PV subarray with a high capacity ratio, one operation strategy based on working mode recognition was proposed to coordinate two competitive objectives—load shifting and smoothing. Furthermore, a capacity configuration model with the objectives of life cycle net present value maximization and output fluctuation minimization was constructed considering the generation income, ES cost, fluctuation characteristics, and typical day type. Moreover, taking a 1 MW subarray with 1.8 capacity ratio in a northeast utilityscale PV power station as a case, the optimal capacity of 700 kW·h was obtained. The simulation results under different typical days verified the feasibility and the effectiveness of the proposed ES operation strategy as well as the configuration model.

photovoltaic  /  high capacity ratio  /  energy storage  /  optimal operation  /  capacity configuration
庞秀岚, 徐希蒙, 马超. 高容配比光伏电站储能运行方式及其容量配置研究. 可再生能源, 2024 , 42 (11) : 1511 -1518 .
Xiulan Pang, Ximeng Xu, Chao Ma. Operation and capacity configuration of energy storage for photovoltaic power station with a high capacity ratio[J]. Renewable Energy Resources, 2024 , 42 (11) : 1511 -1518 .
光伏发电虽然具备清洁、可再生等一系列优越性 [ 1 ] ,但其固有的间歇性、波动性会对电站的并网安全、运行控制等方面带来不利影响 [ 2 , 3 ] 。储能技术能够实现能量在时间以及空间尺度上的再分配,以实现平抑出力波动、调峰调频、提高电能质量等功能 [ 4 - 9 ]
在光伏电站系统的设计中,容配比(PV/Inverter Ratio, ${R}_{\mathrm{{dc}}/\mathrm{{ac}}}$ )指组件安装容量与额定容量的比例 [ 10 ] , 是最为关键的技术参数之一。随着我国光伏产业的不断发展, 组件成本进一步下降, 容配比的设计思路从“小于 1.0”逐步过渡到“大于 1.0”[ 11 , 12 ]。2020 年,典型地区推荐容配比最高可达 1.8 [ 10 ] ,标志着容配比限制的全面放开。合理增加光伏电站容配比可以降低电站交流部分的成本, 提高逆变器、箱变、线缆、升压站等设备的利用率,现已成为提高光伏系统综合利用率、降低度电成本(LOCE)、缩减投资回报周期的有效手段 [ 13 ]
目前, 关于高容配比光伏电站的研究主要集中在最佳容配比设计上 [ 11 - 14 ] 。文献[ 11 ]计及光伏电站各环节系统效率损失,综合考虑发电收益、初始投资、运维成本等因素,优化得到了内部收益率 (IRR)最大时对应的容配比,实现了对高容配比光伏电站的经济性分析。文献[ 13 ]设计了光伏逆变器元件失效概率的计算方法, 综合分析了辐照度分布、发电量损失、逆变器初始成本、逆变器失效与可靠性对容配比的综合影响。文献[ 14 ]指出高容配比有利于增加光伏系统的发电量, 提高效率和供电稳定性, 从而减少发电量的波动。对于高容配比子阵, 光伏出力在午间往往会超过逆变器以及箱变的送出通道限制,产生弃光。故而,配套的储能不仅仅要平抑光伏出力波动, 还需作为能量吞吐的媒介,将午间超发部分的能量搬移至低出力时刻再进行送出。现阶段,某单一目标导向下储能的运行策略以及配置方法的研究已经较为成熟 [ 5 ] ,而高容配比光伏电站中储能往往承担着至少两种非协同的功能。随着光伏发电规模不断增加, 储能技术日益突破, 高容配比的光伏电站如何优化储能的运行方式、确定最佳的储能容量成为了亟待解决的关键问题。
针对高容配比光伏电站的出力特性, 本文设计了一种基于工作模式识别的储能运行方式, 并建立了储能容量配置优化模型。以东北某光伏电站的高容配比子阵作为研究对象, 优化得到了最佳的储能容量,验证了所提出运行方式的合理性、 有效性,以期为将来的工程实践提供一定的参考。
在高容配比光伏子阵内部配置储能, 形成光伏储能联合发电系统, 是目前较为常见的储能配置方式,其典型拓扑结构如 图 1 所示。
图 1 可知, 光储系统联合送出功率由光伏出力、储能出力以及弃能功率 3 部分构成,其表达式为
${P}_{\text{total }}\left( i\right)= {P}_{\mathrm{{PV}}}\left( i\right)+ {P}_{\text{bat }}\left( i\right)+ {P}_{\mathrm{d}}\left( i\right)$
式中: ${P}_{\text{total }}\left( i\right)$ 为光伏储能系统第 $i$ 分钟的联合出力; ${P}_{\mathrm{{PV}}}\left( i\right)$ 为光伏子阵第 $i$ 分钟的不限发出力; ${P}_{\mathrm{{bat}}}\left( i\right)$ 为储能第 $i$ 分钟的出力,正为放电,负为充电; ${P}_{\mathrm{d}}\left( i\right)$ 为第 $i$ 分钟的弃能功率,即光储系统单位时间内的弃电量,当光伏出力超出限电额度时,若储能因功率或容量不足难以存储, 多余的能量只能被弃掉。
影响光伏发电的因素多样, 且影响机理及数学表达复杂,最为主要的是辐照以及背板温度 [ 15 ] 。 计算最大出力点跟踪模式(MPPT)下光伏子阵的不限发出力为
${P}_{\mathrm{{PV}}}\left( i\right)= {P}_{\mathrm{{dc}}}\left\lbrack \frac{I\left( i\right)}{{I}_{\mathrm{{STC}}}}\right\rbrack \left\{{1 - a\left\lbrack {T\left( i\right)- {T}_{\mathrm{{STC}}}}\right\rbrack }\right\}$
式中: ${P}_{\mathrm{{dc}}}$ 为光伏子阵安装容量; $I\left( i\right)$ 为实测条件下第 $i$ 分钟的光照强度; $T\left( i\right)$ 为实测条件下第 $i$ 分钟的背板温度; $a$ 为温度系数,用于表征温度对出力的影响; ${I}_{\mathrm{{STC}}}$$\mathrm{{STC}}$ 标准测试条件下的光强; ${T}_{\mathrm{{STC}}}$ 为 STC 标准测试条件下的组件背板温度。
光伏子阵安装容量可以由容配比以及额定容量计算而得, 即:
${P}_{\mathrm{{dc}}}= {R}_{\mathrm{{dc}}/\mathrm{{ac}}}\cdot {P}_{\mathrm{{ac}}}$
式中: ${P}_{\mathrm{{ac}}}$ 为光伏子阵的额定容量。
随着储能充、放电的进行,其剩余容量与荷电状态的更新分别为
$ S\left({i + 1}\right)= \left\{\begin{array}{ll}\left({1 -\sigma }\right) S\left( i\right)- \frac{{P}_{\text{bat }}\left( i\right)}{60\eta }& {P}_{\text{bat }}\left( i\right)\geq 0 \\\left({1 -\sigma }\right) S\left( i\right)- \frac{{P}_{\text{bat }}\left( i\right)\eta }{60}& {P}_{\text{bat }}\left( i\right)< 0 \end{array}\right.$
$\operatorname{SOC}\left( i\right)= S\left( i\right)/{S}_{\text{cap }}$
式中: $S\left( i\right)$ 为储能第 $i$ 分钟始的剩余容量; $\operatorname{SOC}\left( i\right)$ 为储能第 $i$ 分钟始的荷电状态; $\sigma$ 为储能的自放电率; $\eta$ 储能的充、放电损耗系数 $\left({\eta < 1}\right);{S}_{\text{cap }}$ 为储能的总容量。
综合考虑高容配比光伏子阵的发电特性,本文提出一种基于工作模式识别的储能运行方式, 适用于以能量搬移和平抑波动为目标的高容配比光伏储能联合发电系统。其核心思想是基于光伏的日出力过程, 划分储能两种工作目标对应的时段, 从而有针对性地选择不同的充、放电策略, 达到削弱出力波动、增加能量搬移效益的目的。该方法主要包含以下两个步骤: ①出力信号分解与工作区间划分;②在不同时段应用不同的储能运行方式。
光伏发电的出力信号具有非线性、非平稳性的特点。本文采用离散小波变换将其分解到不同的频率区间, 进而分析局部时域和频域信息, 即:
$ S ={A}_{n}+ \mathop{\sum }\limits_{{i = 1}}^{n}{D}_{i}$
对于任意的原始信号 $S$ ,经过 $n$ 层小波变换后,可以分解并重构得到近似信号 ${A}_{n}$ 以及一系列以 0 为均值的波动信号 ${D}_{i}^{\left\lbrack {16}- {18}\right\rbrack }$ [ 16- 18 ]
在光伏电站并网、停机以及太阳辐照增长的过程中, 有功功率变化应满足电力系统安全稳定运行的要求,有功功率变化率不超过 ${10}\%$ 装机容量/min,具体数值应由电力系统调度机构根据当地电网情况核对给出 [ 19 ] 。当小波分解的层数越多时, 近似信号越平滑, 剩余的波动信号变化越剧烈,对储能的容量、响应时间等性能要求也越高。 因此,本文以近似信号的 $1\mathrm{\;{min}}$ 级别最大波动率 $\bar{\delta }$ 作为判别条件, 选择满足条件的最小分解层数对光伏出力信号进行自适应分解 [ 16 ] $1\mathrm{\;{min}}$ 级别波动率 $\delta \left( i\right)$ 表达式为
$\delta \left( i\right)= \frac{{P}_{\text{total }}\left({i + 1}\right)- {P}_{\text{total }}\left( i\right)}{{P}_{\text{ac }}}\times {100}\%$
考虑到光伏子阵的高容配比特性, 依据储能的主要工作目标, 将光伏出力时段细分为两类时段。近似信号值首次和末次大于限电额度之间的时段为能量搬移时段, 其余为平抑波动时段。
能量搬移以及平抑波动两个时段内, 储能的充、放电指令计算流程如 图 2 所示。
当储能处在能量搬移工作模式时, 光伏出力一般会超出限电额度, 此时尽可能存储超出部分的光伏出力, 光伏储能联合系统以限电额度向外送电。但由于光伏发电的波动特性, 能量搬移模式下的光伏出力也存在少量低于限电额度的情形, 此时储能系统以差额功率进行放电, 补足缺额。上述两种情况可以用式(8)进行统一描述。
${P}_{\text{bat }}\left( i\right)= {P}_{\text{curt }}\left( i\right)+ {P}_{\mathrm{{PV}}}\left( i\right)$
式中: ${P}_{\text{cut }}\left( i\right)$ 为第 $i$ 分钟限电额度,即最大送出通道或区域电网调度中心下达的限电指令, 本文恒取为 ${P}_{\mathrm{{ac}}}$
当储能处在平抑波动工作模式时, 光伏出力一般会低于限电额度, 此时储能的充、放电功率指令由两方面构成:一方面平抑光伏出力的波动;另一方面跟踪参考荷电状态以提升能量搬移和平抑波动的能力。储能的充、放电指令计算式为
${P}_{\text{bat }}\left( i\right)= {P}_{\text{bat },1}\left( i\right)+ {P}_{\text{bat },2}\left( i\right)$
${P}_{\text{bat },1}\left( i\right)= -{P}_{\text{fluc }}\left( i\right)$
${P}_{\text{bat },2}\left( i\right)= \left\{\begin{array}{ll}{60\alpha }\left\lbrack {S\left( i\right)- {S}_{\text{ref }}\left( i\right)}\right\rbrack \eta & S\left( i\right)\geq {S}_{\text{ref }}\left( i\right)\\{60\alpha }\left\lbrack {S\left( i\right)- {S}_{\text{ref }}\left( i\right)}\right\rbrack /\eta & S\left( i\right)< {S}_{\text{ref }}\left( i\right)\end{array}\right.$
式中: ${P}_{\mathrm{{bat}},1}\left( i\right),{P}_{\mathrm{{bat}},2}\left( i\right)$ 分别为储能第 $i$ 分钟的充、 放电功率指令的两个组成部分; ${P}_{\text{fluc }}\left( i\right)$ 为小波分解后得到的第 $i$ 分钟波动信号; ${S}_{\text{ref }}\left( i\right)$ 为储能第 $i$ 分钟始的参考剩余容量; $\alpha$ 为荷电状态补偿系数, 用于表征储能跟踪参考剩余容量速度之快慢。
综合考虑高容配比光伏储能系统的发电收益、储能成本、波动特性、典型日特征等,构建以全生命周期净现值和平抑波动效果为双目标的储能容量优化配置数学模型。决策变量为储能容量 ${S}_{\mathrm{{cap}}}$ ,目标函数的数学表达式为
$\max {f}_{1}\left({S}_{\text{cap }}\right)= \mathop{\sum }\limits_{{y = 1}}^{{N}_{y}}\mathop{\sum }\limits_{{s = 1}}^{{N}_{s}}\frac{{C}_{\mathrm{e}}{r}_{s}{E}_{s}\left({S}_{\text{cap }}\right)\cdot {365}}{{\left( 1 + I\right)}^{y}}- {C}_{s}^{\text{ini }}{S}_{\text{cap }}- \\\mathop{\sum }\limits_{{k = 1}}^{{N}_{\mathrm{m}}}\frac{{C}_{s}^{\mathrm{{re}}}{S}_{\text{cap }}}{{\left( 1 + I\right)}^{{n}_{k}}}$
$\min {f}_{2}\left({S}_{\text{cap }}\right)= \mathop{\sum }\limits_{{s = 1}}^{{N}_{s}}{r}_{s}{\delta }_{s}^{\max }\left({S}_{\text{cap }}\right) $
${N}_{\mathrm{{re}}}= \left\lbrack \frac{{N}_{y}\mathop{\sum }\limits_{{s = 1}}^{{N}_{s}}{r}_{s}{S}_{s}\cdot {365}}{{DOD}\cdot {S}_{\mathrm{{cap}}}{N}_{\text{cycle }}}\right\rbrack - 1 $
式中: ${f}_{1}\left(\cdot \right)$ 为最大净现值目标; ${f}_{2}\left(\cdot \right)$ 为最小波动目标; ${E}_{s}\left(\cdot \right)$ 为在 ${S}_{\text{cap }}$ 储能容量配置下第 $s$ 种典型日的日发电量; ${\delta }_{s}^{\max }\left(\cdot \right)$ 为在 ${S}_{\text{cap }}$ 储能容量配置下第 $s$ 种典型日的日内最大 $1\mathrm{\;{min}}$ 级别波动率; ${N}_{y}$ 为光伏电站运行年限; ${N}_{s}$ 为光伏电站典型日个数; ${N}_{\mathrm{{re}}}$ 为光伏电站储能更换次数; ${N}_{\text{cycle }}$ 为光伏电站储能最大循环次数; ${r}_{s}$ 为第 $s$ 种典型日在全年中的占比; ${C}_{\mathrm{e}}$ 为上网电价; ${C}_{s}^{\text{ini }}$ 为储能的初始投资成本; ${C}_{s}^{\mathrm{{re}}}$ 为储能的置换成本; $I$ 为折现率; ${n}_{k}$ 为储能第 $k$ 次更换的年份; $\left\lbrack \cdot \right\rbrack$ 为向上取整函数; ${S}_{s}$ 为第 $s$ 种典型日的储能总充、放电量; ${DOD}$ 为储能的最大放电深度。
模型中的约束条件包括典型日最大波动率约束以及决策变量的非负约束,即:
$\mathop{\sum }\limits_{{s = 1}}^{{N}_{s}}{r}_{s}{\delta }_{s}^{\max }\leq \bar{\delta }$
$ 0 \leq {S}_{\text{cap }}$
此外, 在储能运行过程中还须满足荷电状态、 系统出力、电池出力以及弃能非正的边界约束, 其表达式分别为
$\underline{\mathrm{{SOC}}}\leq \mathrm{{SOC}}\leq \overline{\mathrm{{SOC}}}$
$ 0 \leq {P}_{\text{total }}\left( i\right)\leq {P}_{\text{curt }}\left( i\right)$
$\underline{{P}_{\text{bat }}}\leq {P}_{\text{bat }}\left( i\right)\leq \overline{{P}_{\text{bat }}}$
${P}_{\mathrm{d}}\left( i\right)\leq 0 $
式中: $\overline{\mathrm{{SOC}}},\overline{\mathrm{{SOC}}}$ ,分别为储能容量的上、下边界约束值; $\overline{{P}_{\text{bat }}},\underline{{P}_{\text{bat }}}$ ,分别为储能出力上、下边界约束值。
为充分阐释所构建模型的求解思路, 将模型应用于实际的过程分解为以下具体步骤:
①收集电站基本资料,包括额定容量、容配比等;调研所处区域电网的电能消纳特性,确定光储系统的限电模式;
②根据当地历史的气象资料,选择具备代表性的典型日,计算每种典型日的时间占比,并采用式(2)计算典型日的光伏出力过程曲线;
③基于电站容配比、装机规模、辐照条件等参数,选择恰当的储能类型,获取储能的基本参数;
④选择合适的步长, 采用本文所提出的运行方式仿真不同储能容量配置下各典型日的光储系统运行过程;
⑤依据光储系统运行过程,采用式(12)~(14) 计算不同储能容量配置下的两个目标函数值;
⑥基于不同储能容量配置下目标函数计算结果, 优选得到最佳储能配置。
本文以东北某大型光伏电站的单个高容配比光伏子阵作为研究对象, 应用所提出的储能运行方式及优化模型确定最佳的储能容量, 进一步分析该储能配置下的储能运行特性。本文以天气类型作为典型日的划分标准,选取 2022 年晴天、多云、阴霾、雨天共 4 种典型日的 $1\mathrm{\;{min}}$ 级别辐照、 背板温度作为模型的输入数据, 4 种天气在全年中的时间占比分别为 ${39}\%,{42}\%,9\%,{10}\%$ 。该光伏子阵额定容量为 ${1000}\mathrm{\;{kW}}$ ,容配比为1.8(安装容量为 ${1800}\mathrm{\;{kW}}$ ),储能设备选用充、放电倍率为 $1\mathrm{C}$ 的磷酸铁锂电池。研究中设置的光伏出力模型参数、光伏子阵参数、储能参数如 表 1 所示。研究中采用的出力波动率限制 $\bar{\delta }$$2{\%}$ [ 18 ] ,折现率 $I$$8\%$ ,上网电价 ${C}_{\mathrm{e}}$ 为 0.374 元 $/\left({\mathrm{{kW}}\cdot \mathrm{h}}\right)$
基于辐照以及背板温度数据,应用式(2)计算 4 种不同典型天气下的不限电出力过程, 如 图 3 所示。
图 3 可以看出, 4 种天气下的发电量依次递减, 晴天出力曲线光滑, 其余天气下出力均存在明显波动。由于子阵的高容配比特性,晴天和多云天气下均存在超出限电额度的现象, 其中晴天尤为显著。因此, 配置储能参与高容配比光伏子阵的能量搬移以及平抑波动具有现实意义。
应用前文提出的储能运行方式, 开展不同储能容量配置、不同典型日情形下的发电量仿真模拟, 典型日占比加权后的光伏储能联合系统日发电量统计结果如 图 4 所示。
图 4 可以看出, 高容配比光伏子阵的日均不限发电量接近 $9\mathrm{{MW}}\cdot \mathrm{h}$ ,该部分能量有 4 种不同的流向, 包括直接送出、存入储能后送出、在储能充/放过程中损耗和弃能。随着储能容量的增加, 弃电量逐渐减少, 储能送出电量及光储系统送出电量逐渐增加, 且增量存在非线性以及边际效益递减的特点。
基于不同储能容量配置下发电量的统计结果,应用式(12) $\sim \left({14}\right)$ 两项目标函数结果如 图 5 所示。
由于增发电量收益与储能成本之间的博弈, 净现值随储能容量增加呈现出先增大后减小的变化趋势,当配置 ${700}\mathrm{\;{kW}}\cdot \mathrm{h}$ 时,净现值达到峰值 1090 万元。光伏储能系统波动性随储能容量配置的关系近似于一条折线。当储能容量小于 400 $\mathrm{{kW}}\cdot \mathrm{h}$ 时,波动率随容量增加快速线性下降; 而当容量超过 ${400}\mathrm{\;{kW}}\cdot \mathrm{h}$ 时,储能即可以平抑全部的出力波动,波动率基本维持恒定。综合考虑以上双方面因素,选择 ${700}\mathrm{\;{kW}}\cdot \mathrm{h}$ 作为储能的最佳配置容量。
本文以 ${700}\mathrm{\;{kW}}\cdot \mathrm{h}$ 最优储能配置作为研究对象, 详细分析不同典型日内的储能仿真运行结果, 以验证前文提出的储能运行方式的有效性以及合理性。 图 6 展示了典型多云天气下,光伏出力信号
经过 “db5” 小波自适应分解后得到的近似信号、波 由 图 6 可知, 相较于原始的出力信号, 近似信动信号以及不同模式的分区。 号明显更加平滑,波动率也下降至 $2\%/\mathrm{{min}}$ 以下。 依据近似信号的出力值与限电额度之间的大小关系,光伏出力时段被划分为了平抑波动模式时段以及能量搬移模式时段,前者分布在上午和下午的低出力时段,后者分布在中午的高出力时段。
4 种不同典型天气下储能充、放电的仿真结果如 图 7 所示。
晴天和多云天光伏出力较高,因此存在两种工作模式,上、下午分别预先设置了折线型参考剩余容量, 供储能在平抑波动模式下进行跟踪。阴霾和雨天天气光伏出力较低, 故仅存在平抑波动一种工作模式, 参考剩余容量恒为总容量的 50%。 由 图 7(a)可知, $4 :{00}- 8 :{00}$ 储能追踪 “ $\mathrm{z}$ ” 字型参考荷电状态进行放电, SOC 从 50% 下降至 10%, 为午间的能量搬移预留了空间。8:00 起光伏出力超过限电额度, 储能切换为能量搬移工作模式, 充分吸纳超发电量直至约 10:00 达到充满状态。10: 00-15:00,储能没有盈余容量,超发的电能被舍弃, 光伏储能联合系统以限电额度向外送电。后续储能切换回平抑波动模式, 追踪折线型参考荷电状态将存储的电量放出,恢复到 50% 的常态 ${\mathrm{{SOC}}}_{0}$图 7(b)可知,典型多云天气下储能不仅实现了能量搬移, 还通过不断地吞吐能量, 平抑了光伏出力的波动, 极大增加了出力稳定性以及并网友好性。由 图 7(c)可知,典型阴霾天气下光伏出力较低,储能仅参与平抑波动作业。设置 50% 参考剩余容量保证了储能在充、放电过程中, 大部分时段都维持在较为健康的中间状态, 同时也为应对光伏出力的突变预留了余量。由 图 7(d)可知,典型雨天天气下,储能对光伏出力的“毛刺”进行了平抑, 削弱了其波动性。由此可见, 储能参考剩余容量的设置给高容配比光伏储能系统的联合运行提供了积极的引导, 最大限度地利用储能参与到能量搬移以及平抑波动的作业之中。
4 种典型日下的量化统计结果如 表 2 所示。
表 2 可知, 在晴天和多云天气时, 配置的 ${700}\mathrm{\;{kW}}\cdot \mathrm{h}$ 储能基本可以实现一次满充、满放的能量搬移,增加发电量约 ${0.6}\mathrm{{MW}}\cdot \mathrm{h}$ 。在多云、阴霾、 雨天天气时,储能也能有效平抑波动,压低日内最大出力波动率至 $2\%/\mathrm{{min}}$ 以内。经过统计,若未配置储能,则约有 17%的光伏资源将被浪费。若配置 ${700}\mathrm{\;{kW}}\cdot \mathrm{h}$ 的储能,则可以将原本 ${33}\%$ 的弃电量搬运至低出力时刻重新送出,系统发电量将增加6.73%,日内平均最大波动率将从 5.3% 下降至 1.6%。
本文针对高容配比光伏子阵的储能运行方式建立了储能容量优化配置模型。该方法兼顾储能的平抑波动以及能量搬移两种工作目标,可以在提高电能质量的同时减少弃光损失。
①本文结合小波分解, 采用跟踪参考剩余电量等方法, 提出了一种基于不同工作模式识别的储能充、放电策略。
②综合售电收益、储能成本、不同典型日出力特征等,建立了以光伏储能系统全生命周期净现值最大以及加权波动率最小为双目标的储能容量优化配置模型。
③以东北某大型光伏电站的高容配比子阵作为案例,选取 4 种不同天气作为典型日,定量分析了发电量与储能容量间的关系。结果表明, 对于 1.8 容配比的光伏子阵,配置 ${700}\mathrm{\;{kW}}\cdot \mathrm{h}$ 的储能可以最大限度地提高发电收益, 改善电能质量。
  • 大庆市新能源领域“揭榜挂帅”科技攻关项目(HGS-KJ/KJGLB-[2021]第31号)
  • 国家自然科学基金项目(51722906)
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  • 接收时间:2023-05-16
  • 首发时间:2025-07-22
  • 出版时间:2024-11-20
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  • 收稿日期:2023-05-16
基金
大庆市新能源领域“揭榜挂帅”科技攻关项目(HGS-KJ/KJGLB-[2021]第31号)
国家自然科学基金项目(51722906)
作者信息
    1 天津大学 建筑工程学院 天津 300350
    2 青海黄河上游水电开发有限责任公司 青海 西宁 810008
    3 天津大学 水利工程仿真与安全国家重点实验室 天津 300072

通讯作者:

马超(1981-),男,博士,教授,研究方向为清洁能源协同开发与高效利用。E-mail: 。
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2种不同金属材料的力学参数

Family
属数
Number of
genus
种数
Number of
species
占总种数比例
Percentage of
total species (%)

Genus
种数
Number of
species
占总种数比例
Percentage of total
species (%)
鹅膏菌科Amanitaceae 2 11 5.26 鹅膏菌属 Amanita 10 4.78
小菇科 Mycenaceae 2 12 5.74 丝盖伞属 Inocybe 5 2.39
多孔菌科 Polyporaceae 8 14 6.70 蜡蘑属 Laccaria 5 2.39
红菇科 Russulaceae 3 23 11.00 小皮伞属 Marasmius 6 2.87
小菇属 Mycena 11 5.26
光柄菇属 Pluteus 5 2.39
红菇属 Russula 17 8.13
栓菌属 Trametes 5 2.39
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