基于能量比的断路器过流保护判定算法研究

Research on Over-current Protection Determination Algorithm of Circuit Breaker Based on Energy Ratio

针对电子式断路器所采用的三段式过流保护的算法在电流大范围变化时的不足,文章提出了一种基于能量比的断路器过流保护判定算法。此算法实现了不同反时限直线之间能量的统一计算,从而可以实现电流在不同反时限特性直线变换时准确地判断动作时间,具有多段反时限特性统一判定的特点。最后,通过MATLAB进行仿真试验,验证了文章算法在电流大范围变化时能够准确、合理地计算出断路器动作时间点。

Aiming at the shortcomings of the three-section over-current protection algorithm used in electronic circuit breaker when the current changes in a wide range, this paper puts forward a judgment algorithm of circuit breaker overcurrent protection based on energy ratio. This algorithm has realized the unified energy calculation between different inverse time linear, which can realize current in different inverse time characteristic linear transformation when the action time of the accurate judgment, has the characteristics of period of inverse time characteristics more unified decision. Finally, through MATLAB simulation experiment was carried out to verify the algorithm in this paper the current on a wide range of change accurately calculate the circuit breaker operation time point reasonably.