电力变压器综合保护算法与实现

Power Transformer Integrated Protective Arithmetic and Implement

针对常规继电保护装置功能单一的缺点,应用DSP,开发了集测量、控制和保护一体化的电力变压器计算机综合保护系统。在保护算法方面,综合考虑了算法的精确性、可靠性、计算量及响应速度后,决定以相关算法作为主要的算法。该算法利用变压器两侧电流的互相关函数值来判别变压器的各种运行状态。该系统已应用到某石化公司的25000 kVA电力变压器上,经过两年的运行,保护动作的正确率大于98%以上。

Power transformer is one of the very most important equipments in power system,so it is necessary to protect them for safely running.A computer integrated protection system of transformer on DSP is studied,which has functions of measurement,control and protection.On the protective algorithm aspect,the correlative arithmetic was adopted after considering the accuracy,reliability,account capacity,and response speed.Using the correlative function of two-side current in transformer,the algorithm can distinguish...