智能开关控制单元的研究

发布时间：2019-01-10 11:18

【摘要】：目前我国正在大力发展智能电网建设，其中智能变电站的建设是建设智能电网的核心内容。建设智能变电站要对现有的变电站进行智能化改造，主要是实现一次设备的智能化，也就是用电子互感器代替传统的互感器，使用智能开关代替传统的高压开关，从而实现变电站内高压电路和低压电路的有效隔离，保证变电站工作的稳定性和维护的简便性。目前为保证智能变电站中一次设备智能化的实现，便引入一种叫智能终端的设备，也可以称之为控制单元。通过这种设备来实现使传统的一次设备智能化，有利于传统变电站智能化改造。智能开关控制单元就是一种智能终端，这种设备在智能电网建设中是不可或缺的。针对目前国内这种设备的产品并不多，技术上还不统一和成熟，而且其市场需求大，所以智能开关控制单元这种设备还很值得研究。本文首先介绍了智能控制单元的研究背景，设备的特点及其国内外发展现状。接下来研究了控制单元的微机保护算法，介绍了一些传统算法，并创造性地提出了新的算法，并通过仿真分析比较几种算法，说明了新算法的优越性，确定了控制单元所采用的算法。对于控制单元如何实现线路保护进行了研究，主要是如何实现分段电流保护，重点研究了反时限过流保护及其配合的问题，对于实际应用提供了一些参考。对于高压系统中的单相自动重合闸还涉及到故障选相问题，这里研究并确定了计算方法和选相方案。考虑到控制单元的实际应用，对控制单元的硬件上采用了模块化设计，设计了主控电路板、采样电路板，，还设计了采样互感器线圈。通过一定的实验，对硬件进行了测试，验证了设计的可行性。对智能开关控制单元仍需要进一步研究，本文研究的内容为其后续的研究提供了一些可靠的支持与参考。
[Abstract]:At present, smart grid construction is being vigorously developed in China, among which the construction of intelligent substation is the core content of smart grid construction. To build intelligent substations, we should carry out intelligent transformation of existing substations, mainly to realize the intelligentization of primary equipment, that is, to use electronic transformers instead of traditional transformers, and to use intelligent switches to replace traditional high-voltage switches. Thus, the high voltage circuit and low voltage circuit in substation can be separated effectively, and the stability and maintenance of substation can be ensured. At present, in order to ensure the intelligent realization of primary equipment in intelligent substation, a kind of equipment called intelligent terminal is introduced, which can also be called control unit. The traditional primary equipment is intelligentized by this equipment, which is beneficial to the intelligent transformation of traditional substation. Intelligent switch control unit is a kind of intelligent terminal, which is indispensable in the construction of smart grid. At present, there are not many products of this kind of equipment in our country, the technology is not uniform and mature, and its market demand is large, so the intelligent switch control unit is worth studying. This paper first introduces the research background of intelligent control unit, the characteristics of the equipment and its development status at home and abroad. Then, the microcomputer protection algorithm of control unit is studied, some traditional algorithms are introduced, and some new algorithms are creatively proposed, and the superiority of the new algorithm is illustrated through the simulation analysis and comparison of several algorithms. The algorithm used in the control unit is determined. The control unit how to realize the line protection is studied, mainly how to realize the segmented current protection, especially the inverse time overcurrent protection and its coordination, which provides some references for the practical application. For the single phase automatic reclosing in high voltage system, the fault phase selection problem is also involved. The calculation method and phase selection scheme are studied and determined here. Considering the practical application of the control unit, the hardware of the control unit is designed by modularization, the main control circuit board, the sampling circuit board and the sampling transformer coil are designed. Through certain experiments, the hardware is tested and the feasibility of the design is verified. The intelligent switch control unit still needs further research, and the content of this paper provides some reliable support and reference for its subsequent research.
【学位授予单位】：哈尔滨理工大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TM564

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