配电网广域保护算法研究及装置设计

发布时间：2018-02-17 06:06

本文关键词： 配电网广域保护故障定位算法保护装置设计　出处：《华北电力大学》2014年硕士论文　论文类型：学位论文

【摘要】：随着电力技术的发展和进步,配电网结构也随之复杂化,对继电保护装置自身性能要求也逐步增强。传统的继电保护装置虽然在不断进步,从最初的电磁型保护逐步到微机型保护,但是局限性依然存在,不能满足新型电网对其正确、快速、可靠三项基本指标的要求,此外传统保护一般只覆盖局部配电网,并不能考虑保护动作对整个配电网产生的影响。而广域保护理念的提出将继电保护引入一个全新的领域,借助日趋成熟的通信技术,使得广域范围内所有相关电气量与信息得以共享。当电网发生故障后,广域保护决策系统可以对保护区域进行决策控制,通过高速的光纤通信,实现主站故障定位与广域保护功能同时实现,确保电网的安全性。本文将广域保护思想与配电网网络特性相结合,提出了基于方向比较原理的配电网广域保护及故障定位算法,应用配电网广域保护算法对几种常见的配电网接线方式进行了详细的分析,实现配电网各个节点信息间的有效结合,快速定位故障区域。随后利用PSCAD仿真平台建模仿真,依据详细的仿真曲线分析了配电网发生相间短路故障及单相接地故障时的广域保护及故障定位动作过程。本文分析了广域保护终端的构造及其功能,如实现关键技术、涉及硬件芯片和检测终端的硬件设计等,并对终端设备进行了相应的改进；研究了广域保护终端软件实现方法,分析了其数据采样流程,并编制了相应功能算法的实现函数。对于广域保护主站,首先,给出了配电网广域保护主站软件的流程框图；然后,设计了广域保护故障定位算法以及相应的子函数；最后简要说明了广域保护的动作过程。利用RTDS实时仿真平台上的实际线路仿真分析,很好的验证了本文所提出的广域保护及故障定位算法的有效性。
[Abstract]:With the development and progress of power technology, the structure of distribution network becomes more complicated, and the performance requirements of relay protection devices are gradually enhanced. From the initial electromagnetic protection to the microcomputer protection, but the limitations still exist, which can not meet the requirements of the new power grid for its correct, fast and reliable three basic indicators, in addition, the traditional protection generally only covers the local distribution network. It is not possible to consider the impact of protection action on the whole distribution network. However, the concept of wide area protection has introduced relay protection into a new field, with the aid of increasingly mature communication technology. When the power network fails, the wide area protection decision-making system can control the protection area, through high-speed optical fiber communication, The main station fault location and wide area protection function are realized simultaneously to ensure the security of power grid. In this paper, the wide area protection and fault location algorithm based on the principle of direction comparison are proposed, which combines the idea of wide area protection with the characteristics of distribution network. Based on the wide area protection algorithm of distribution network, several common distribution network connection methods are analyzed in detail to realize the effective combination of the information of each node in the distribution network, and to quickly locate the fault area. Then, the PSCAD simulation platform is used to model and simulate the distribution network. Based on the detailed simulation curves, the wide area protection and fault location process of distribution network with interphase short circuit fault and single phase grounding fault are analyzed. In this paper, the structure and function of wide area protection terminal are analyzed, such as the key technology, the hardware design of hardware chip and detection terminal, and the corresponding improvement of terminal equipment, the realization method of wide area protection terminal software is studied. The data sampling flow is analyzed, and the realization function of the corresponding function algorithm is worked out. For wide area protection master station, firstly, the flow chart of distribution network wide area protection master station software is given, and then the flow chart of the distribution network wide area protection master station software is given. A wide area protection fault location algorithm and its corresponding subfunctions are designed. Finally, the operation process of wide area protection is briefly explained. The effectiveness of the proposed wide-area protection and fault location algorithm is well verified by using the actual circuit simulation analysis on the RTDS real-time simulation platform.
【学位授予单位】：华北电力大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TM774

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