考虑电网频率偏差的风电功率爬坡限制指标动态优化

发布时间：2018-01-08 14:00

本文关键词：考虑电网频率偏差的风电功率爬坡限制指标动态优化　出处：《电网技术》2015年09期 　论文类型：期刊论文

【摘要】：制定风电并网功率的爬坡限制指标可以有效抑制风电剧烈爬坡事件对电网频率偏差的影响。提出了一种考虑电网频率偏差的风电功率爬坡限制指标动态优化策略,根据电网的实时运行情况,对风电并网功率爬坡限制指标进行动态优化,使系统频率始终处于安全范围内。首先以电网的动态频率特性为基础,建立含一次调频和二次调频特性的电力系统频率仿真模型;然后利用二分法,根据电网频率偏差限值获得最优爬坡限制指标,从而有效避免了因固定爬坡限制指标过于宽松而导致的系统状态越限,以及爬坡限制指标过于苛刻而导致的风电场爬坡控制经济性较差的缺点。最后,通过IEEE RTS算例的仿真结果验证了所提策略的有效性。
[Abstract]:The influence of severe climbing event of wind power on the frequency deviation of power grid can be effectively restrained by establishing the limit index of wind power connected to power grid. A dynamic optimization strategy of wind power climbing limit index considering frequency deviation of power grid is proposed in this paper. . According to the real-time operation of the power grid, the dynamic optimization of the wind power climbing limit index is carried out to make the frequency of the system always within the safe range. Firstly, the dynamic frequency characteristics of the power grid are taken as the basis. The frequency simulation model of power system with primary frequency modulation and secondary frequency modulation is established. Then the dichotomy method is used to obtain the optimal climbing limit index according to the limit value of the frequency deviation of the power network, which effectively avoids the system state overrun caused by the fixed slope climbing limit index being too loose. And the disadvantage of poor economy of wind farm climbing caused by too strict limit index of climbing slope. Finally, the effectiveness of the proposed strategy is verified by the simulation results of IEEE RTS example.
【作者单位】：浙江大学电气工程学院;中国电力科学研究院;
【基金】：国家863高技术基金项目(2011AA05A113)~~
【分类号】：TM614
【正文快照】： 刻而导致的风电场爬坡控制经济性较差的缺点。最后,通过IEEE RTS算例的仿真结果验证了所提策略的有效性。0引言作为目前最成熟、经济效益最好的可再生能源发电技术之一,风电在我国得到了快速的发展。然而,我国风电资源丰富、适合大规模开发风电的地区一般都处于电网末端,电网

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