【摘要】 电流互感器 (CT)饱和时 ,母线保护装置的可靠、安全、稳定运行是衡量母线保护的一项重要指标。文中分析了CT饱和时的特点 ,提出了一种用于数字母线保护装置的基于瞬时值的CT饱和检测方案。该方案与基于瞬时值比率制动的差动保护有机的结合 ,使数字母线保护装置具有快速、较高的抗CT饱和的优势。已有采用此方案的数字母线保护装置在电力系统中运行。更多还原

【Abstract】 It is very important for busbar protection that when CT saturated, the reliability of busbar protection has influenced the safe and stable operation of electric power system. Analyzed the criteria of busbar protection, the sampling CT saturation arithmetic used for numberic busbar protection is presented in this paper. Combined with the sampling arithmetic for differential current protection, the high speed for operation and stability for CT saturation of busbar protection is satisfied.Hundred of protections using the theory have been served in electric power system.更多还原