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梯级水电水位调节与中长期检修、外送计划协调优化

发布时间:2018-06-22 05:02

  本文选题:流域水电 + 检修计划 ; 参考:《中国电力科学研究院》2017年硕士论文


【摘要】:我国能源负荷逆向分布的特点决定了中国能源流将呈现“由北到南,自西向东”的基本格局。为应对这种基本格局,基于特高压交直流的跨省跨区输电成为电网发展的重点领域。目前已建好的宾金直流、锦苏直流、复奉直流将西南大量的水电输送到东部负荷区。由于外送水电既包括大型流域水电也包含送端省份大量小型的径流式水电(通常表现为水电外送电力交易),一般大型流域水电都配有年度或季度调节水库,将中长期的水库调度与大量小型径流式水电共同外送进行深入融合是进一步提升水力资源和电网利用效率的有效手段之一。另一方面,由于送端电网缺乏负荷需求,配套电源基本全部外送,这造成了送端电网结构薄弱,电力通常经过几个关键断面然后汇集到换流站实现外送,因此这些关键断面就成了外送的“容量关卡”。虽然断面的输电限额与电网运行方式、负荷需求、开机方式等共同决定,但检修计划的制定则直接影响断面传输功率。在条件允许的情况下,检修计划与一次能源的丰枯特性及电力外送计划进行有序配合对水电的充分消纳具有重要意义。本论文以实现解决流域调度(在此主要涉及水库蓄水、消落的水位调节问题)、外送计划及相关电网检修的协调配合为目标,在中长期时间范畴内,寻找三者之间的协调策略,构建包含三者的一体化协调模型,通过模型的求解确定最佳配合方案。主要研究内容和成果包括:(1)量化分析水库运行水位、区间流量对电站出力和蓄能能力的影响,分析电站组间出力比例关系和蓄能转换关系等耦合关系的特点和模式,提出梯级电站耦合关系的描述方法。(2)分析梯级水电水位调节、发电计划、检修计划、外送计划等业务领域的关键决策变量和参量,提出水电水位调节、外送计划、检修计划与发电计划的协调策略,形成适应不同决策变量和参数设置方式下的以发电计划为核心的多业务联合协调方法。(3)确定流域梯级水电中长期水位调节、发电计划及检修计划联合协调目标函数、约束条件,以发电计划为纽带,提出流域梯级水电中长期水位调节、发电计划及检修计划联合协调模型构建方法。(4)研究开发流域梯级水电中长期水位调节、发电计划及检修计划联合协调求解算法,在考虑水库水位、区间流量及出力水平的基础上实现梯级电站出力比例设置,开展对四川大型流域梯级水电大规模外送的应用场景分析,验证模型算法的正确性和有效性。论文成果可为大型流域水电中长期水位调节、外送计划、检修计划的联合协调提供分析计算工具。充分发挥大型流域水电抽蓄能作用,实现区域内不同调节能力、所属不同调度机构的水电资源协调配合,提供大规模输电通道利用效率,促进清洁能源消纳。
[Abstract]:The reverse distribution of energy load in China determines the basic pattern of energy flow from north to south and from west to east. In order to deal with this basic pattern, transprovincial transmission based on UHV AC / DC has become a key area of power grid development. At present, Binjin DC, Jinsu DC and DC are built to transport a large amount of hydropower from southwest to the eastern load area. Since outsourced water and power supply includes both large watershed hydropower and a large number of small run-off hydropower stations in the sending provinces (usually manifested as hydropower outsourced electricity transactions), large watershed hydropower stations are generally equipped with annual or quarterly regulating reservoirs. It is one of the effective methods to further improve the efficiency of hydraulic resources and grid utilization by integrating the long-term reservoir operation with a large number of small runoff hydropower plants. On the other hand, due to the lack of load demand in the power supply network, the complete power supply is basically sent out, which leads to the weak structure of the power supply network. The power usually passes through several key sections and then converges to the converter station to realize outgoing transmission. As a result, these critical sections become outgoing "capacity points". Although the transmission quota of section is decided by the operation mode, load demand and start-up mode of the power network, the plan of maintenance and repair directly affects the transmission power of the section. If conditions permit, it is of great significance that the maintenance plan, the characteristics of primary energy supply and output, and the power delivery plan cooperate in an orderly manner for the full absorption of hydropower. The aim of this paper is to realize the coordination of river basin operation (mainly involving reservoir water storage and water level regulation), outgoing plan and maintenance of relevant power grid. In the medium and long term, the coordination strategy among the three is sought. An integrated coordination model with three components is constructed, and the optimal coordination scheme is determined by solving the model. The main research contents and achievements are as follows: (1) the effects of reservoir water level and interval discharge on the output and storage capacity of the power station are analyzed quantitatively, and the characteristics and models of the coupling relations, such as the ratio of the output force and the energy storage conversion between the groups of the power station, are analyzed. The coupling relationship of cascade hydropower stations is described. (2) the key decision variables and parameters in the fields of cascade hydropower water level regulation, generation plan, maintenance plan, outgoing transmission plan, etc., are analyzed, and the hydropower water level regulation and outgoing transmission plan are put forward. The coordination strategy between overhaul plan and generation plan is formed to form a multi-service joint coordination method with power generation plan as the core under different decision variables and parameter setting methods. (3) the medium and long-term water level regulation of cascade hydropower in river basin is determined. The power generation plan and maintenance plan jointly coordinate the objective function, restrict the condition, take the generation plan as the link, put forward the medium and long term water level regulation of cascade hydropower in river basin, The method of constructing the joint coordination model of power generation plan and maintenance plan. (4) to study the long-term water level regulation of cascade hydropower station in river basin, and to solve the algorithm of joint coordination of generation plan and maintenance plan, considering the water level of reservoir, On the basis of interval flow and output level, the output ratio of cascade hydropower stations is set up, and the application scenario of large-scale outputting of cascade hydropower stations in Sichuan large watershed is analyzed, and the correctness and validity of the model algorithm are verified. The results of this paper can provide analysis and calculation tools for the joint coordination of water level regulation, outgoing plan and maintenance plan of hydropower stations in large river basins. The utility model can give full play to the function of hydropower pumping and storage in large river basins, realize the different regulating capacity in the region, coordinate the hydropower resources of different dispatching agencies, provide large-scale transmission channel utilization efficiency, and promote clean energy consumption.
【学位授予单位】:中国电力科学研究院
【学位级别】:硕士
【学位授予年份】:2017
【分类号】:TM73

【参考文献】

相关期刊论文 前10条

1 周明;夏澍;李琰;李庚银;;含风电的电力系统月度机组组合和检修计划联合优化调度[J];中国电机工程学报;2015年07期

2 张运洲;程路;;中国电力“十三五”及中长期发展的重大问题研究[J];中国电力;2015年01期

3 许丹;李晓磊;丁强;崔晖;韩彬;;基于全网统筹的联络线分层优化调度[J];电力系统自动化;2014年02期

4 陈伟杰;;浅谈输电线路电磁环境对人的影响[J];中国高新技术企业;2012年19期

5 葛晓琳;舒隽;张粒子;;考虑检修计划的中长期水火电联合优化调度方法[J];中国电机工程学报;2012年13期

6 裴哲义;伍永刚;纪昌明;李国春;;跨区域水电站群优化调度初步研究[J];电力系统自动化;2010年24期

7 周佳;马光文;张志刚;;基于改进POA算法的雅砻江梯级水电站群中长期优化调度研究[J];水力发电学报;2010年03期

8 董子敖,李英;大规模水电站群随机优化补偿调节调度模型[J];水力发电学报;1991年04期

9 董增川;叶秉如;;水电站库群优化调度的分解方法[J];河海大学学报;1990年06期

10 张勇传,李福生,熊斯毅,黄益芬;变向探索法及其在水库优化调度中的应用[J];水力发电学报;1982年02期

相关博士学位论文 前4条

1 夏澍;适合风电接入电力系统的中短期发电调度模型与方法[D];华北电力大学;2014年

2 张睿;流域大规模梯级电站群协同发电优化调度研究[D];华中科技大学;2014年

3 王永强;厂网协调模式下流域梯级电站群短期联合优化调度研究[D];华中科技大学;2012年

4 刘涵;水库优化调度新方法研究[D];西安理工大学;2006年

相关硕士学位论文 前4条

1 王莹莹;基于多约束条件的电网检修计划编制的研究[D];华北电力大学(北京);2011年

2 雷常青;交通控制与诱导递阶协调方法的研究[D];天津大学;2004年

3 陈赞成;大系统分解协调算法及其应用研究[D];厦门大学;2001年

4 李滨;基于现代内点理论的电力系统最优潮流研究[D];广西大学;2001年



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