一种具有可变箝制电压的瞬时脉冲抑制装置的设计

Design of a suppression device with changeable clamping voltage based on TVS array

瞬时脉冲给电网以及电力设备带来很多极坏的影响。文中提出了一种基于具有可变箝制电压的基于瞬态电压抑制器(TVS)阵列的新型瞬时脉冲抑制装置。该装置工作在220V低压电力线上,抑制与电力线电压同极性瞬时脉冲,保护连接在电力线上的各种设备。通过结合TVS管多种击穿电压特点,一种以TVS管阵列为执行机构,以数字信号处理器(DSP)为控制器,以对电力线电压同步为基础的具有多箝制电压的新型瞬态电压抑制装置在文中提出。装置的硬件设计、基于混合数字滤波器的电压同步算法、控制算法等分别在文中介绍。最后通过仿真分析与实际测试,与基于单一箝制电压TVS管的脉冲抑制相比,得出本装置不仅能对出现在交流电波形的波峰处的尖峰脉冲电压进行抑制,而且对于交流电波形的其它处的尖峰脉冲电压也能大部分削除。

Impulse influences power system and electrical equipments badly. A novel TVS array based impulse suppression device with changeable clamping voltage that works on 220V （phase voltage） power line to protect low voltage apparatus is proposed in this paper. The idea of this TVS array based novel impulse suppression device, which works under the synchronization with power line voltage and employs economical TVS array as its actuator, is proposed. The design of hardware of device, which consists of actuator part, voltage transformation part and controller, is introduced. The synchronization algorithm employs hybrid digital filter is described. The straightforward control strategy of this device is introduced. The simulation and test results show effects of this novel device with different TVS array compared with device with TVSs with single clamping voltage, and demonstrate that this device can suppress impulse that happens not only at the peak but also at other place of waveform of power line voltage with better performance.