基于瞬时值解析的交流输电路径电气份额计算

发布时间：2018-05-08 01:41

本文选题：电力网络 + 交流输电路径　；参考：《中国电机工程学报》2014年25期

【摘要】：多个电气用户共用交流输电路径时,能否正确计算各自对输电路径的使用份额系数,关乎电力系统许多技术和经济问题的客观公正解决。然而,该问题目前尚未取得达成共识的解决方法。经重新审视发现,现有方法的研究思路普遍基于交流电路有关物理量的平均值、从相量分析的角度构造电气份额(electrical share,ES)计算关系,该思路可能从一开始就为方法存在理论缺陷埋下了隐患。文中回归到从交流电路瞬时值角度探讨问题的解决之道:先由交流电气用户和输电路径上的瞬时功率或瞬时电流的实际分布(包括方向和数值)情况,定义瞬时ES系数,再对瞬时ES系数求特定时间周期内的平均值。先求待研究物理量的瞬时值再求其平均值的计算方式,符合对任意连续时间过程相关物理量的一般评估思路。在此基础上,针对交流输电路径受端节点联接等效负荷用户(或送端节点联接等效电源用户)、送端节点联接电源和负荷用户、受端节点联接电源和负荷用户几种方式,给出了不同用户使用输电路径的瞬时ES系数和平均ES系数解析计算关系。理论检验和数值算例对比分析结果表明,源于瞬时值解析得出的ES系数计算方法,更具理论正确性,有可能尽早使问题取得共识性成果。
[Abstract]:It is important to solve many technical and economic problems of power system whether the share coefficient of transmission path can be calculated correctly when many electric users share AC transmission path. However, there is no consensus solution to the problem. After re-examination, it is found that the existing research ideas are generally based on the average of the relevant physical quantities in AC circuits, and the calculation relationship of electrical shares is constructed from the angle of phasor analysis. This idea may have buried hidden trouble for the theoretical defect of the method from the beginning. This paper returns to the solution of the problem from the point of view of the instantaneous value of AC circuit. Firstly, the instantaneous es coefficient is defined by the actual distribution of instantaneous power or instantaneous current (including direction and value) on AC electric users and transmission paths. Then, the average value of the instantaneous es coefficient in a given time period is obtained. The method of calculating the instantaneous value of the physical quantity to be studied and then the average value is in line with the general evaluation idea of the physical quantity related to any continuous time process. On this basis, aiming at several ways of connecting the equivalent load user (or the sending node to the equivalent power user), the sending node connecting the power supply and load user, the receiving node connecting the power supply and the load user, the receiving node is connected with the power supply and load user. The relationship between the instantaneous es coefficients and the average es coefficients of different users using transmission paths is given. The results of theoretical test and numerical examples show that the calculation method of es coefficient derived from instantaneous value analysis is more accurate and may make the problem reach consensus results as soon as possible.
【作者单位】：哈尔滨工业大学电气工程及自动化学院;
【基金】：高等学校博士学科点专项科研基金资助项目(2010230 2110021) 国家自然科学基金项目(51377035,50477008,51361130153)~~
【分类号】：TM744

【相似文献】