一二次配合的配电线路自适应重合闸

针对配电线路常规重合闸因重合前不能区分永久性和瞬时性故障可能造成多次短路冲击的问题，系统论述了基于一二次配合的配电线路自适应重合闸技术。介绍了基于一二次配合的配电线路自适应重合闸4种实现途径，即：限流试探法、电容放电试探法、脉冲试探法和载波试探法。分别论述了限流试探法串联型和并联型两种结构的工作原理以及技术特点，并给出限流阻抗典型参数。理论分析了电容试探法的回路放电特性及阻容参数的选取原则并给出了典型取值。指出脉冲试探法的关键在于分相快速开关的分闸速度和动作离散度，并建议了脉冲试探法下的阻抗参数识别方法实现原理。给出了载波试探法的信号频率及试探电压的选取原则以及典型值。

Adaptive reclosing of distribution lines based on primary and secondary device coordination

Potential multiple short-circuit surges caused by the conventional reclosing of distribution lines do not distinguish permanent from transient faults before reclosing. Thus an adaptive reclosing technology of distribution lines based on primary and secondary device coordination is proposed. Four typical adaptive reclosing methods of distribution lines based on primary and secondary device coordination are introduced. They are the current limiting trial, capacitor discharge trial, pulse trial and carrier wave trial methods. The principle and characteristics of series and parallel current limiters of the current limiting trial method are discussed and a typical impedance of the current limiter is provided. The circuit discharge characteristics of the capacitor discharge trial method and choice principle of resistance and capacitance parameters are analyzed theoretically and the typical parameters are given. It is pointed out that the key technique of the pulse trial method is the opening speed and action dispersion degree of the split phase breaker. The principle of an impedance parameter identification method is proposed. The choice principle of the frequency and voltage test signal and their typical values are given for the carrier wave trial method. This work is supported by National Natural Science Foundation of China (No. U1766208).