【作者】 张勇；

【导师】 肖建； 迟永宁；

【作者基本信息】 西南交通大学 ， 电力系统及其自动化， 2012， 硕士

【摘要】 随着我国风电装机容量的快速增长,大规模风电并网消纳问题越来越突出。传统风电装机规划主要以最严峻的系统约束条件下,某个时间断面上的系统最大风电接纳容量或系统风电穿透功率极限等容量指标指导风电规划。该方法没法从规划时间区间上,反映系统风电接纳电量,所以没法衡量风电场全年发电量及风电等效利用小时数。由于我国风电规划主要关注风电机组等效利用小时数、弃风电量、弃风小时数和火电利用小时数等指标,所以本文针对我国区域风电消纳困难的问题,从风电规划需求出发,保障安全用电,充分挖掘系统发电机组调峰性能,提高系统风电接纳能力。本文通过计算整个时间区间上系统可接纳风电电量和风电等效利用小时数对系统风电接纳能力进行评估。综合国内外风电规划思想,本文运用PowerFactory系统仿真软件对规划电网进行仿真,得到实际电网对装机容量的限制。通过本文机组运行计划定制模型,求取时间区间上的最优机组组合。通过分析机组出力特性,求取系统机组最小技术出力时间序列,得到系统可消纳风电空间时间序列。结合风电出力时间序列,根据本文风电电量计算模型,在整个时间区间上计算系统可接纳风电电量。归结起来,需要计算两个过程,即系统机组运行计划和系统可接纳风电电量。考虑到工程实际运用和模型求解复杂度,本文提出运用分步优化思想,将两个过程分别进行计算,得到系统消纳风电电量和等效利用小时数,进而指导风电装机规划。本文深入研究抽水蓄能电站和区域间联络线对系统风电接纳能力的影响。对抽水蓄能电站进行时序生产模拟建模,得到利于算法处理的形式,通过时序生产模拟制定抽水蓄能电站出力曲线。综合抽水蓄能电站储存的电量与容量,合理调整系统调峰机组的运行状态,评估系统调峰压力的改善及系统风电接纳能力的提高。区域间联络线可以将局部多余的风电进行外送,提高系统风电接纳能力。本文研究的是联络线传输功率固定的情景。对负荷曲线进行调整。在新的时序负荷曲线下,定量分析系统风电接纳能力提升程度。综合上述解决方案,本文开发了一个基于Delphi的电力系统风电接纳能力分析仿真平台。仿真平台整体架构基于C/S模型,主要运算任务由终端完成,服务器主要管理用户信息及供给服务信息。为方便以后的开发,整个分析平台在数据结构中留出了相应的接口,为后续开发工作打下基础。该分析平台计算结果对风电装机规划有一定的参考价值。更多还原

【Abstract】 With the rapid growth of China’s wind power installed capacity, large-scale wind power accommodated issue becomes more and more serious. Traditional wind power program is based on the accommodated capacity of the system under the most severe conditions at a moment. This method couldn’t get the total electric quantity then it couldn’t evaluate the total effect. As the current main wind program targets are utilization hours, abandoned hours and etc, this article focuses on the wind power accommodated capability of power grid. Starting with the requirement of wind power and safe utilization of electricity, it assesses the wind power accommodated capability of power grid by the peaking capability of units.Combined with the international wind power program ideas, we simulate the actual power grid to get the limit of the wind power integration by PowerFactory. The best combination of units will be obtained by units program model. With the unit combination, the minimal technical output could be obtained and the accommodated power sequence could be calculated. Combined with the wind farm output sequence, the amount of electricity could be calculated by the integration of accomodated wind power sequence on the time interval. To sum up, there are two processes to be calculated, which are system unit operation plans and calculation of quantity of electricity. Considering the engineering usage and the complexity of mathematical model, we deal with the two processes seperately to get the target of the wind power program project.Besides, this article studies the impact of the pumped storage power station and inter-regional tie line on the system on the capability of wind power accomodation. Building a model of pumped storage power station, this article customizes the output sequence of units by equivalent energy function method. By sending the excess wind power to another region to improve the wind power accommodated capability, this article studies the scenario of constant power of tie line. The load curve could be adjusted by treating the night and day delivery capacity differently. With new timing load curve, we recalculate the amount of accomodated wind power of power grid.According to above solutions, this article has developped an analysis and simulation platform on wind power accomodated capability of power grid based on Delphi. The whole structure of this platform is based on C/S model. The computing tasks are mainly on the terminals and the server is the manager of the client information. In order to prepare for the future development, the platform has reserved some interfaces. This platform is verified to be efficient by the real projects and could be useful for wind power program.更多还原