基于噪声估计的自适应快速距离保护  

NOISE EVALUATION BASED ADAPTIVE FAST DISTANCE RELAY PROTECTION

作　　者：黄瀛[1] 何奔腾[1] 王文雄[2] 马文龙[2] 

机构地区：[1]浙江大学电气工程学院,浙江省杭州市310027 [2]国电南京自动化股份有限公司,江苏省南京市210003

出　　处：《电力系统自动化》2004年第14期6-8,62,共4页Automation of Electric Power Systems

摘　　要：继电保护滤波算法的速度和滤波能力间的固有矛盾阻碍了传统继电保护动作速度的进一步提高。提出了一种基于噪声估计的自适应快速距离保护,通过实时检测故障信号的噪声水平来估计滤波算法的误差,并根据误差大小自动调整距离保护的动作门槛,以此获得最佳的动作速度。该保护已在某数字式高压线路保护装置中获得应用。该装置的动模试验结果表明,所提出的自适应快速距离保护可以有效地防止区外故障时的超越,同时在区内故障时具有很快的动作速度。The contradiction between the speed and the filter performance of relay protection filter algorithm has prevented further improvement of speed of relay protection. This paper proposes a noise evaluation based adaptive fast distance relay protection, that evaluates the error of filter algorithm by real-time detecting the noise level of fault signal, and adapts the action threshold of distance relay according to the error, to get the best action speed. The relay protection has been adopted by a digital high-voltage transmission-line protection instrument. The physical test result of the instrument proves that the relay protection not only can prevent error action during out-area faults, but also has very fast action speed during in-area faults.

关 键 词：距离保护 快速保护 最小二乘法 噪声估计 自适应 

分 类 号：TM773[电气工程—电力系统及自动化]