基于DSP+ARM的双核低压智能断路器控制器系统设计研究

Design and research of dual-core control system for low-voltage intelligent circuit breaker based on DSP + ARM

为了满足智能电网的发展需求,设计了一种由DSP和ARM组成的双核控制器结构的低压智能断路器控制系统。对新型智能控制器的总体结构、硬件组成、测量保护算法、控制程序等进行介绍。针对采用傅里叶算法时衰减的直流分量会对计算的电力参数引入误差,提出采用改进的傅里叶测量算法进行修正,进一步提高电力参数的准确性,并根据三段电流保护特性原理对系统进行保护控制。实验证明:所提出的方法能有效提高计算参数的精度,系统在实现基本的智能保护功能外,还可以对低压配电系统的状态进行网络化的实时监测,提高智能断路器的可靠性,具有较好的实用性。

In order to meet the development demands of smart grid, a low voltage circuit breaker control system is designed, which is a dual - core controller composed of DSP and ARM. The overall structure and the hardware composition of the new type intelligent controller, the measurement protection algorithm and control procedures are introduced. Aiming at the prob- lem that the decaying DC component introduces errors in the calculated power parameters using Fourier algorithm, improved Fourier algorithm is used to correct the power parameters to improve the accuracy. Experiment results proves that the pro- posed method can improve the accuracy of calculation parameters effectively, the system can monitor networked the state of low - voltage power distribution system in real - time. It improves the reliability of intelligent circuit breaker.