光伏发电并网对电力系统电压稳定的影响分析

发布时间：2018-06-08 03:21

本文选题：光伏发电 + 电压稳定　；参考：《郑州大学》2014年硕士论文

【摘要】：目前，在能源和环境的双重压力下，发展利用清洁新能源已是迫在眉睫。太阳能发电的诸多综合优势如无区域性、总量丰富、清洁零污染等特点，成为当前最有发展前景和价值的新型能源，太阳能发电中的光伏发电并网利用方式是重点发展的方向。使用光伏发电必须研究并网系统的电压稳定问题。光伏发电并网系统的电压稳定与否，很大程度上决定着整个光伏发电的未来发展与使用。本文首先以光伏发电并入无穷大系统为对象，分别研究了光伏发电并网系统的有功、无功及负荷改变时，系统电压的变化情况。接下来对光伏发电接入三机九节点系统进行了定点分析。分析中从负荷模型的有无、等值发电机的零功率及满功率、光伏发电的零、满功率等几方面做了较深入的分析和对比讨论。具体内容如下： (1)在对光伏发电系统模型分类介绍的基础上，根据本文所研究的内容，分别建立无穷大系统的各部分的模型，，包括光伏发电环节的整体模型、负荷综合模型、光伏发电系统综合模型，并对所建的光伏发电系统并网模型进行了仿真验证； (2)通过得到的无穷大系统的电压变化曲线，对比分析光伏发电接入系统后，改变系统有功、负荷，得到系统电压变化情况。并在等值发电机接入后，对比分析光伏发电和等值发电机的电压变化结果。 (3)建立了三机九节点系统的简化电路。通过将光伏发电、负荷、等值发电机分别接入同一节点分析系统电压的变化情况。综合以上研究结果，得到了将光伏发电并入系统不会造成电压失稳，且具有提高系统电压稳定级别的结论。本文研究结果对光伏发电并网的调度管理有一定参考价值。
[Abstract]:At present, under the dual pressure of energy and environment, the development and utilization of clean new energy is imminent. Many comprehensive advantages of solar power generation, such as non regional, abundant, clean and zero pollution, have become the most promising new energy sources, and the grid utilization of photovoltaic power generation in solar power generation is the key issue. The direction of the exhibition. The voltage stability of the grid system must be studied using the photovoltaic power generation. The voltage stability of the grid connected system of photovoltaic power generation determines the future development and use of the whole photovoltaic power generation.
This paper first studies the change of the system voltage when the photovoltaic power generation system is active, reactive and load, and the system voltage is changed when the photovoltaic power generation is connected to the infinite system. Then the fixed point analysis is carried out on the three machine and nine node system which is connected with the photovoltaic power generation. The full power, the zero and full power of photovoltaic power generation have been analyzed and discussed in more detail.
(1) on the basis of the classification of the photovoltaic power system model, according to the contents of this paper, the models of each part of the infinite system are established, including the whole model of the photovoltaic power generation link, the load synthesis model, the integrated model of the photovoltaic power generation system, and the simulation verification of the grid connected model of the photovoltaic power generation system.
(2) by comparing and analyzing the voltage variation curve of the infinite system, after comparing and analyzing the photovoltaic power generation access system, the system active power and load are changed and the voltage change of the system is obtained. And the voltage variation results of the photovoltaic power generation and the equivalent generator are compared and analyzed after the equal generator is connected.
(3) the simplified circuit of the three machine nine node system is set up. The voltage changes of the same node analysis system are connected by the photovoltaic power generation, the load and the equivalent generator respectively.
Based on the above research results, it is concluded that incorporating PV generation into the system will not cause voltage instability and improve the voltage stability level of the system.
The research results in this paper have some reference value for dispatching management of grid connected photovoltaic power generation.
【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】：TM615

【参考文献】