计及发电机无功越限的广域戴维南等值参数在线计算方法

发布时间：2018-01-29 14:15

本文关键词： 无功越限戴维南等值广域测量参数辨识　出处：《电力系统自动化》2016年11期 　论文类型：期刊论文

【摘要】：为适应可再生能源大规模接入带来的随机性和波动性,在广域量测条件下,提出基于单一运行状态断面数据的戴维南等值参数在线跟踪计算方法。首先,对负荷节点的负荷进行等效阻抗处理;其次,通过修正原系统节点导纳矩阵得到等效阻抗处理后的系统导纳矩阵;最后,根据修正后导纳阵和节点电压方程,按戴维南等值的定义,计算负荷节点的开路电压作为戴维南等值电势,进而获得负荷节点的戴维南等值全部参数。在该方法基础上,还可以较为准确地计算发电机无功越限即PV转PQ节点情况下的戴维南等值参数。通过仿真算例分析验证了该方法的正确性和有效性,在PV转PQ节点情况下也具有较好的计算精度。
[Abstract]:In order to adapt to the randomness and volatility brought about by the large-scale access of renewable energy, a method of on-line tracking and calculation of Thevenin equivalent parameters based on single running state section data is proposed under the condition of wide-area measurement. The load of load node is treated with equivalent impedance. Secondly, the system admittance matrix after equivalent impedance is obtained by modifying the original system node admittance matrix. Finally, according to the modified admittance array and node voltage equation, according to the definition of Davinan equivalent, the open circuit voltage of load node is calculated as Thevenin equivalent potential. Then all the equivalent parameters of the load node are obtained. It is also possible to accurately calculate the Thevenin equivalent parameters in the case of PV / PQ node. The correctness and effectiveness of the method are verified by a simulation example. In the case of PV to PQ node, it also has good calculation accuracy.
【作者单位】：电网智能化调度与控制教育部重点实验室(山东大学);中国电力科学研究院;
【基金】：国家自然科学基金资助项目(51177091) 国家电网公司科技项目(XT71-15-056)~~
【分类号】：TM744
【正文快照】： 上网日期:2016-04-25。0引言随着电网互联规模的扩大、电力需求的快速增长,电力系统运行点越来越接近稳定极限。在线监视电网电压稳定的研究引起了国内外学者广泛关注与重视[1-2]。基于戴维南等值的电压稳定在线分析,因其方法概念清晰、原理简单等优点使之成为电压稳定领域一

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