【作者】 陈燕坤；

【导师】 王毅；

【作者基本信息】 北京交通大学 ， 电工理论及新技术， 2007， 硕士

【摘要】 本文致力于低压断路器的核心单元智能脱扣器的研制。主要目的是为了实现低压断路器的智能保护、远程控制和管理及实时性和高精度，主要内容为低压断路器智能脱扣器的软硬件设计及与上位机通信。本文首先介绍了低压断路器智能脱扣器的国内外发展状况，根据目前国内的智能断路器存在的不足，本文提出基于DSP的设计方法。接下来介绍智能脱扣器的理论分析，包括电流、电压等参数的计算、对短路电流的进行了理论研究和计算分析，并用MATLAB／SIMULINK做了相应的仿真以及三段电流保护算法等。硬件设计包括应用TI公司的TMS320F2812 32位DSP为核心处理器处理模块，信号调理及控制模块，输入输出模块等硬件系统。设计的DSP核心处理模块，充分考虑了系统仿真调试、电源监控的需要；信号调理及控制模块采用轨对轨的低功耗放大器对信号进行AD采样前的调理和采用大电容存储能量以满足脱扣器瞬间脱扣能量的需要；输入输出模块包括液晶显示模块、键盘、储存设备等，可以显示电网实时参数、用户修改保护参数及储存数据等。在软件方面，给出了主程序及各个子程序的流程图，包括子程序中的三段电流保护、反时限、液晶显示、FFT、通信等程序。实验结果表明，本文研制的低压断路器智能脱扣器系统基本上达到了预期的设计效果，对开发商品化的低压断路器智能脱扣器系统具有一定的参考价值。更多还原

【Abstract】 This thesis aims at the development of Intelligent Release, the core modules of low voltage circuit breaker (LVCB). The main purpose is to realize the wisdom of low voltage circuit breaker protection, and management and real-time remote control and high accuracy. The main content of this thesis is the design of hardware and software of the low-voltage circuit breaker intelligent release and the LVCB communication with upper computer.In the beginning of the thesis, the status of LVCB intelligent release development in the world is introduced. According to the shortage of the current domestic devices, DSP-based design method is presented. And Intelligent Release relative theories are described, including the computation of current, voltage, the theoretical research and analysis on short-circuit situation, the emulation of short-circuit using MATLAB/SIMULINK software, the algorithm of 3-section current protection etc. Then the hardware design is . The hardware have three units, the kernel handling unit based on TI’s TMS320F2812 32-bit DSP, the signal modulation and control unit, the input and output unit. The debugging the whole system and the monitoring the supply power are taken into account when the DSP kernel handling unit is framed. Rail-to-rail, low power consume amplifiers, which are used to modulate the signal before A/D sampling, are adopted in the signal modulation unit. A large volume capacity is chosen to meet tripping instantly energy needs in control unit. The input and output unit is composed of LCD, keyboard, storage devices etc, and its functions are to display the real-time parameters during the operation, to modify the protection parameters, to save the data. Afterward, the software of the whole system is depicted. The main program and the subprograms consisting of their flow process diagrams are expounded. And the subprograms include 3-section current protection program, inverse time lag program, LCD display program, FFT program, communication program etc.Experimental results indicate the LVCB intelligent release basically achieve expectant purpose. And the LVCB intelligent release has a certain reference value onthe development and commercialization.更多还原