大规模风电并网电力系统的调频特性研究
发布时间：2018-11-15 17:08
【摘要】：随着化石能源枯竭与环境恶化,新能源成为了人类可持续发展的唯一出路。风力发电作为较成熟的新能源开发与利用技术,得到了迅速的发展与推广,风电并网容量呈现快速增长趋势。但是由于风力发电具有极大的不确定性与波动性,随着风电并网容量的增加,风电功率波动对电网频率的影响愈加明显。为了提高大规模风电并网电力系统的频率稳定性,本文深入分析了风电功率对电网频率的影响特性,提出了一种对风电功率引起电网频率最大偏移值的评估方法。首先,在不考虑发电机出力边界等非线性因素的前提下,建立考虑风电接入的线性系统频率响应模型,从而得到风电功率波动引起电网频率最大偏移值的计算公式。接着,考虑发电机出力边界对电网调频的影响,提出一种能够考虑发电机出力边界的频率最大偏移值评估方法。并利用DIgSILENT/PowerFactory验证了评估方法的有效性与准确性。在考虑风电接入的电力系统频率响应模型的仿真中,本文发现了高频风电功率下传统机组调速系统的调频失效现象,调频失效现象的出现原因是调速器与原动机物理执行机构存在反应滞后特性,并通过DIgSILENT仿真证明了调频失效现象的存在。传统机组调速系统的调频失效现象揭示了如何有效地抑制风电功率波动必然是未来大规模风电并网电力系统的研究课题之一。
[Abstract]:With the depletion of fossil energy and environmental deterioration, new energy has become the only way out for human sustainable development. Wind power generation as a mature new energy development and utilization technology, has been rapid development and promotion, wind power grid capacity presents a rapid growth trend. However, due to the great uncertainty and volatility of wind power generation, with the increase of wind power grid capacity, the influence of wind power fluctuation on power grid frequency becomes more and more obvious. In order to improve the frequency stability of large-scale wind power grid connected power system, this paper deeply analyzes the influence of wind power on power network frequency, and puts forward a method to evaluate the maximum frequency offset caused by wind power. Firstly, without considering the nonlinear factors such as generator output boundary, the frequency response model of linear system considering wind power access is established, and the calculation formula of the maximum frequency offset caused by wind power fluctuation is obtained. Then, considering the influence of generator output boundary on power grid frequency modulation, a method for evaluating the maximum frequency offset is proposed, which can take account of generator output boundary. The validity and accuracy of the evaluation method are verified by DIgSILENT/PowerFactory. In the simulation of the frequency response model of power system considering wind power access, the frequency modulation failure phenomenon of the traditional speed regulation system is found under the high frequency wind power. The reason of frequency modulation failure is that the governor and the physical actuator of the prime mover have the characteristic of reaction lag, and the phenomenon of frequency modulation failure is proved by DIgSILENT simulation. The failure of frequency modulation in the traditional speed regulation system reveals that how to effectively suppress the fluctuation of wind power is one of the research topics of large-scale wind power grid power system in the future.
【学位授予单位】：南京理工大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TM614;TM712
本文编号：2333911
[Abstract]:With the depletion of fossil energy and environmental deterioration, new energy has become the only way out for human sustainable development. Wind power generation as a mature new energy development and utilization technology, has been rapid development and promotion, wind power grid capacity presents a rapid growth trend. However, due to the great uncertainty and volatility of wind power generation, with the increase of wind power grid capacity, the influence of wind power fluctuation on power grid frequency becomes more and more obvious. In order to improve the frequency stability of large-scale wind power grid connected power system, this paper deeply analyzes the influence of wind power on power network frequency, and puts forward a method to evaluate the maximum frequency offset caused by wind power. Firstly, without considering the nonlinear factors such as generator output boundary, the frequency response model of linear system considering wind power access is established, and the calculation formula of the maximum frequency offset caused by wind power fluctuation is obtained. Then, considering the influence of generator output boundary on power grid frequency modulation, a method for evaluating the maximum frequency offset is proposed, which can take account of generator output boundary. The validity and accuracy of the evaluation method are verified by DIgSILENT/PowerFactory. In the simulation of the frequency response model of power system considering wind power access, the frequency modulation failure phenomenon of the traditional speed regulation system is found under the high frequency wind power. The reason of frequency modulation failure is that the governor and the physical actuator of the prime mover have the characteristic of reaction lag, and the phenomenon of frequency modulation failure is proved by DIgSILENT simulation. The failure of frequency modulation in the traditional speed regulation system reveals that how to effectively suppress the fluctuation of wind power is one of the research topics of large-scale wind power grid power system in the future.
【学位授予单位】：南京理工大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TM614;TM712
【参考文献】
相关期刊论文 前6条
1 张刘冬;殷明慧;宋坤隆;苏大威;汪成根;邹云;;基于净负荷分步建模的旋转备用优化确定风险分析方法[J];电力系统自动化;2015年24期
2 孙元章;林今;李国杰;黎雄;;采用变速恒频机组的风电场并网问题研究综述(英文)[J];电力系统自动化;2010年03期
3 李建林;高志刚;付勋波;李政珉;;几种典型的风力发电系统对比分析[J];电源技术应用;2007年09期
4 何智星;杨俊华;王海兵;;风力发电机组并网控制技术研究[J];中国水运(学术版);2007年03期
5 任丽亚;张建东;;风力发电对电力系统运行的影响[J];中国科技信息;2007年02期
6 孙华东;汤涌;马世英;;电力系统稳定的定义与分类述评[J];电网技术;2006年17期
，本文编号：2333911
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