基于协同学理论的小电流接地系统单相接地故障选线方法

提出了一种基于协同学理论的小电流接地系统单相接地故障选线方法。利用协同学理论下的绝热近似等效原理将描述故障的方程组中的变量划分为快驰豫参量和慢驰豫参量，并消去前者使方程简化；将选线过程视为序参量动力学系统的运行，通过研究实验样本在该系统中的演化判断其结构和最终状态，从而选出故障线路。该方法提取模式的整体特征，可有效避免选取特征量时的困难。实例分析表明，该方法有效可行并具有很强的抗干扰性。该研究对协同学理论在电力系统中的应用有启发作用。

Faulty Line Detection Method for Single-Phase to Ground Fault in Small Current Neutral Grounding System Based on Synergetic Theory

A synergetic theory based faulty line detection method for single-phase to ground fault occurred in small current neutral grounding system is proposed. By use of adiabatic approximation in synergetic theory, the variables in the equation set describing the fault are divided into fast transition parameters and slow transition parameters, then by means of eliminating the fast transition parameters the equation set is simplified; regarding the faulty line detection as the operation in a kinetic system of order-parameters and by means of researching the evolution of experimental sample in kinetic system the structure and state of the sample are judged, so the faulty line can be detected. The proposed method extracts global feature of patterns, thus the difficulty during choosing eigen-quantity can be effectively avoided. Results of case analysis show that the proposed method is feasible and possesses good anti-interference feature. The research is illuminating for the application of synergetic theory in power system.