10kV线路无功补偿及其监测

发布时间：2018-03-29 14:07

本文选题：10kV线路　切入点：无功补偿节点位置　出处：《郑州大学》2014年硕士论文

【摘要】：我国电力工业发展迅猛，配电网的电力负荷不断增长，无功功率的需求也在不断地增长，无功功率是保证电力系统电能质量、降低电网损耗以及保证其安全运行所不可缺少的部分。配电网线路中多以10kV线路为主，因此做好10kV线路的无功补偿具有重要的意义,是建设好配电网的一个不可或缺的环节。本文主要介绍了无功补偿的背景意义、线路无功补偿的原理，并对不同补偿方式的优缺点进行比较分析，杆塔上并联电容器这种补偿方式，一次性投资小、后期维护方便，比较适合长距离配电线路。根据配电网自身的特点，本文采用前推回代法进行潮流计算，并编写计算程序，经过实例验证，此种算法计算速度快，方法简单，能够可靠的收敛。本文采用了适用于任何负荷结构和分布的配电网的数学模型，，并且以网损最小为目标函数。利用无功二次精确矩的方法对节点位置进行选择，并引入了修正系数，引入修正系数之后使得选择结果更符合实际的情况。在补偿位置确定的情况下，引入了拉格朗日乘子来求补偿容量的最优解，此方法根据极值的必要条件，化为线性方程组的求解问题，便于编程计算，十分简单和高效。在息县10kV线路无功补偿实际工程中运用本文所论述的方法进行理论计算分析，并结合工程实际情况，安装后收到了良好的效果。此外，文章又详细介绍了线路无功补偿监测系统，它采用GPRS远程通讯技术来实现后台监控主机与控制器之间的数据采集与交换，并具体介绍了通讯模块DTU的设置过程，对后台软件的功能做了详细的介绍。
[Abstract]:With the rapid development of power industry in China, the power load of distribution network is increasing, and the demand of reactive power is also increasing. Reactive power is to ensure the power quality of power system. It is important to reduce power loss and ensure its safe operation. In distribution network, 10kV line is the main line, so it is of great significance to do well the reactive power compensation of 10kV line, which is an indispensable link in the construction of distribution network. This paper mainly introduces the background significance of reactive power compensation, the principle of line reactive power compensation, and compares the advantages and disadvantages of different compensation methods. It is more suitable for long distance distribution lines. According to the characteristics of distribution network, this paper adopts forward push-back method to calculate power flow, and compiles the calculation program. The example proves that this algorithm has the advantages of fast calculation speed, simple method and reliable convergence. In this paper, the mathematical model of distribution network suitable for any load structure and distribution is adopted, and the minimum network loss is taken as the objective function. The location of nodes is selected by using the method of quadratic accurate moments of reactive power, and the correction coefficient is introduced. When the compensation position is determined, the Lagrangian multiplier is introduced to find the optimal solution of the compensation capacity, which is based on the necessary conditions of extreme value. The method discussed in this paper is used in the practical project of reactive power compensation for the 10kV line in Xixian county, and the method is used to calculate and analyze the problem in theory, and combined with the actual situation of the project, it is very simple and efficient to solve the problem of solving the linear equation group. Good effect has been received after installation. In addition, the paper also introduces the line reactive power compensation monitoring system in detail, which uses GPRS remote communication technology to realize the data acquisition and exchange between the background monitor host and the controller, and introduces the setting process of the communication module DTU in detail. The function of background software is introduced in detail.
【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】：TM761.12

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