基于改进的连续潮流的静态电压稳定分析的研究

发布时间：2018-06-16 20:30

本文选题：电压稳定 + 连续潮流　；参考：《郑州大学》2014年硕士论文

【摘要】：近些年来，在全球范围内发生了很多起电力系统的电压失稳事故，这就使静态电压稳定成为电力系统稳定性研究的重点之一。我国已经进入大电网、大机组、高电压、重负荷、远距离互联化的输电时代，电力系统必然会比之前面临更多的电压失稳的影响。因此，正确的对电力系统的安全稳定性进行评价，使电力系统具有足够的功率裕度来防止电压过低所导致的电压崩溃事故，这具有非常重要的意义。本文是以连续潮流为基础，首先对连续潮流进行了改进，，然后用改进的连续潮流对电力系统的静态电压稳定性进行了分析，结果显示改进的连续潮流有着较好的计算效果。首先，本文对连续潮流的算法原理、特点以及一些其他的相关问题进行论述；同时对连续潮流在静态电压稳定分析中的应用进行了分析。其次，本文提出了改进参数化的PQ分解的连续潮流法，在校正过程中，本文提出了一种新的参数化方法，该方法是以几何相似性的参数化方程进行参数化，然后本文使用PQ分解法求解扩展潮流。在预测过程中，本文使用拉格朗日二次插值法进行预测来提高计算效率。和传统的连续潮流法相比较，本文所提出的改进参数化的PQ分解的连续潮流法的计算时间大幅的减少、计算所占用的内存量更少、计算的准确度更高。最后，本文编写了改进参数化的PQ分解的连续潮流的程序，采用IEEE14、39、57节点系统的三个算例还有某地区的一个实际算例对本文的所给出方法进行了验证，计算结果证明了本文所提出的算法的快速性、正确性以及有效性。
[Abstract]:In recent years, there have been a lot of power system voltage instability accidents in the world, which makes static voltage stability become one of the key points of power system stability research. China has entered the era of large power grid, large unit, high voltage, heavy load, long distance interconnection, and the power system is bound to face more voltage instability than before. Therefore, it is very important to evaluate the security and stability of power system correctly and make the power system have enough power margin to prevent the voltage collapse caused by too low voltage. Based on the continuous power flow, this paper first improves the continuous power flow, and then analyzes the static voltage stability of the power system by using the improved continuous power flow. The results show that the improved continuous power flow has a good calculation effect. Firstly, the algorithm principle, characteristics and some other related problems of continuous power flow are discussed, and the application of continuous power flow in static voltage stability analysis is analyzed. Secondly, a continuous power flow method with improved parameterized PQ decomposition is proposed. In the process of correction, a new parameterization method is proposed, which is parameterized by parameterized equations with geometric similarity. Then the PQ decomposition method is used to solve the extended power flow. In the process of prediction, Lagrangian quadratic interpolation method is used to improve the computational efficiency. Compared with the traditional continuous power flow method, the computational time of the improved parameterized PQ decomposition continuous power flow method is greatly reduced, the amount of memory consumed by the calculation is less, and the accuracy of the calculation is higher. Finally, the program of continuous power flow with improved parameterized PQ decomposition is compiled. The method is verified by three examples of IEEE 14997 bus system and a practical example in a certain area. The results show that the proposed algorithm is fast, correct and effective.
【学位授予单位】：郑州大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TM712

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