ATSE自动转换开关电器PC级新型智能控制器的设计

发布时间：2019-04-01 18:57

【摘要】：自动转换开关电器(ATSE)在输配电系统中作紧急供电执行元件,是使供电电源在一路电源出现故障后自动转换到另一路备用无故障电源的开关电器,保障重要负荷连续、可靠的运行。其中PC级ATSE是一种双电源转换的专用开关电器,得到更广泛的应用。目前国内外ATSE制造商设计和生产的PC级产品的智能控制器具有的功能都是非优线路选择,而在应用中一些不允许断电并对供电质量有相当要求的场所,需要对两路供电电源实现择优选择；下级负载是重要贵重设备时还需在一定范围内对负载有过电流反时限保护,防止设备故障扩大。本文设计了一种新的PC级ATSE的智能控制器,使ATSE在具备常用的功能同时,通过增加控制器的功能,实现对两路供电电源的择优选择,对下级负载实现过电流反时限保护,并且优化设计了整个控制电路,增强了控制器的抗电磁干扰能力。(1)通过对常用、备用电源相关参数中的谐波进行监测,在一段时间内对两路供电电源的电能质量进行对比,先是对参数的采样,确定采用傅里叶变换(FFT)对供电线进行谐波检测分析,对两路电源分别进行THD计算确定最优供电电源并进行相应转换,设计相应控制电路和控制程序。(2)通过对负载的电流取样,控制器监测负载的电流波动状况,通过微型机反时限过电流保护特性曲线数学模型计算出反时限保护动作时限值存入控制器的程序存储器EPROM中,由控制器程序实施对负载的过电流保护。(3)由于增加了PC级ATSE的智能控制器的功能,其相应的控制电路也会增加,使整个智能控制器的控制电路更加复杂,通过对整个电路布线优化设计,增加相应的电子元件提高抗干扰能力,对整个智能控制器进行EMC试验,使之能能达到相应国家标准要求。本设计的新型PC级ATSE智能控制器增加了现行市场上使用的智能控制器的功能,使这种开关电器具有了择优选择供电线路的功能,反时限过电流保护的功能加强了对重要场所和重要设备的保护,这种新型智能控制器控制功能更强大,它满足了市场需求,填补了市场空白,将会有广泛的应用前景。
[Abstract]:Automatic switching apparatus (ATSE) acts as an emergency power supply executing element in transmission and distribution system, which makes the power supply automatically switch to another fault-free power supply after one power supply fails, and ensures the continuity of important loads. Reliable operation. Among them, PC ATSE is a special switch with dual power conversion, which has been widely used. At present, the intelligent controller of PC grade products designed and produced by ATSE manufacturers at home and abroad has the function of non-optimal line selection, but in the application of some places that do not allow power to be cut off and have considerable requirements for the quality of power supply, It is necessary to select the optimal power supply for the two-way power supply. When the lower load is an important and valuable equipment, it is necessary to protect the load from overcurrent inverse time in a certain range, so as to prevent the equipment failure from expanding. In this paper, a new intelligent controller of PC-level ATSE is designed, which makes ATSE have common functions, and by adding the function of controller, the selection of two power supply sources can be realized, and the over-current inverse time-limit protection can be realized to the lower load. And the whole control circuit is optimized to enhance the anti-electromagnetic interference ability of the controller. (1) by monitoring the harmonics in the parameters of the common standby power supply, The power quality of the two power supply sources is compared in a period of time. Firstly, the parameters are sampled and the Fourier transform (FFT) is used to detect and analyze the harmonics of the power supply line. The optimal power supply is calculated by THD, and the corresponding control circuit and control program are designed. (2) by sampling the load current, the controller monitors the current fluctuation of the load, and the current fluctuation of the load is monitored by the controller, and the current fluctuation of the load is monitored by the controller. The operating time limit value of inverse time limit protection is stored in the program memory EPROM of the controller by using the mathematical model of the characteristic curve of the inverse time limit over current protection of a microcomputer. The overcurrent protection of the load is implemented by the controller program. (3) due to the addition of the function of the intelligent controller of PC ATSE, the corresponding control circuit will also be increased, which makes the control circuit of the whole intelligent controller more complicated. By optimizing the design of the whole circuit wiring and adding the corresponding electronic components to improve the anti-jamming ability, the EMC test of the whole intelligent controller is carried out, so that it can meet the requirements of the corresponding national standards. The new PC-grade ATSE intelligent controller designed in this paper adds the function of the intelligent controller used in the current market, which makes the switching apparatus have the function of selecting the power supply line optimally. The function of inverse time-limit over-current protection strengthens the protection of important places and important equipment. This new intelligent controller has more powerful control function, it satisfies the market demand, fills the market gap, and will have a wide application prospect.
【学位授予单位】：福州大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TM571

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