基于多场景裕度的风电接入电力系统的无功分区方法
首发时间:2018-03-08
摘要:传统无功电压分区算法常采用无功灵敏度或者电气距离作为主要指标。这类算法往往计算较复杂,难以体现电压调节过程,同时对风电场发电的不稳定因素有欠考虑。针对这些问题,本文将节点电压偏移,风电场出力分布,区域内部节点电压灵敏度以及无功储备这些因素综合考虑,提出一种基于静态电压调节过程的无功裕度指标以及适应该指标的分区算法。分区算法首先在风电出力期望的场景下,利用无功功率潮流追踪原理,实现满足区域平衡的预分区方案。其次将风电场发电离散化为多个场景,在此基础上计算分区的无功裕度,通过分区聚类而实现最终的无功电压分区。通过 IEEE-39 节点标准测试系统对算法进行仿真,仿真结果验证了算法的可行性与优越性。
关键词: 无功裕度 风电场出力场景 潮流追踪 静态电压调节 分区聚类
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Partition for Wind Power intergration System Based on Multi-scenario Reactive Reserve Margin
Abstract:In the traditional reactive voltage partitioning algorithms, reactive power sensitivity or electrical distance are often used as the main indices. But most of these algorithms are complicated and unable to reflect the regulation ability of regional voltage . Another flaw of these algorithms is that the uncertain factors of wind power are neglected. In response to these problems, this paper presented a new definition of reactive power margin based on the progress of static voltage regulation and its corresponding partitioning algorithms . Through this process, voltage deviation, probability distribution of wind power, regional bus voltage sensitivity and the reactive power reserve are all considered synthetically. In the new partitioning algorithm, the pre-partition scheme is firstly established by reactive power tracing and the calculation results of power flow under the wind power expectation scenario. Secondly, the wind power generation was discretized into multiple scenarios and then each area\'s reactive power margin was calculated by algorithm determining. The final partition scheme could be reached by clustering the areas . The simulation result of IEEE 39-bus testing system showed the perfect feasibility and superiority of the new algorithm.
Keywords: reactive power margin wind power output scene flow tracing, static voltage regulation clustering
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