【摘要】 为了满足10 kV配电系统用户分支线的实际情况和保护需求,研制了一种专用保护跳闸的涌流控制器,给出了10 kV馈线涌流控制器的硬件设计框图和软件流程。根据差动电流的全波傅氏算法和半波傅氏算法的计算结果及励磁涌流与内部故障电流的差异,提出了一种基于差动电流波形特征的励磁涌流识别新方法。理论分析和仿真试验结果表明,该方法能够快速区分励磁涌流和内部故障电流。同时,较好地克服了传统制动原理的缺点,并提高了差动保护的可靠性和安全性。电磁兼容实验也证明该控制器具有抗干扰等优点。更多还原

【Abstract】 In order to meet the actual situation and protection demands of the consumers’ branches in 10 kV distribution system.A special inrush controller of protection tripping was developed,the hardware diagram and software flow of designed 10 kV feeder inrush controller were given out.Considering the characteristic of full-wave and half-wave Fourier algorithm calculable result on difference current,according to the difference with inrush current and internal failure current,put forward a new method to identify inrush current based on the characteristic of differential current waveform.The theoretical analysis and simulation experiment show that the method can distinguish inrush current and internal failure current quickly.At the same time,it overcomes shortcoming on traditional brake principle and increases difference protection credibly and safety.An EMC measurement verified its merits of anti-interference.更多还原