But , the alarm signals from scada have disadvantages as follows : ( 1 ) the open - air feeder terminal units ( ftu ) are interfered by strong electromagnetic and thunder . besides , the failure of relays and the fault of ftu can also lead to that fault information is interfered and aberrant . ( 2 ) in the process of transmission and commutation , the error in the communication equipment may result in the signals err or lose 然而,现有的scada系统在配电网发生故障时提供给调度员的警报信息有如下局限性: ( 1 )面向现场的户外馈线终端ftu运行环境恶劣,承受强的电磁、雷电干扰,并且由于继电器节点故障、 ftu元器件损坏等因素的存在,使得配电网信息受干扰、畸变的可能性较高; ( 2 )在信号传输及变换过程中,通讯装置的故障等原因,也可能导致信号出错甚至丢失; ( 3 )保护装置和断路器本身也有可能误动或拒动。
雷电: thunder and lightning干扰: disturb; obstruct; jam; back ...电干扰: electrical interference防静电干扰: antistatics交流电干扰: interference of alternating current静电干扰: electrostatic disturbance; electrostatic interference; precipitation statics; static noise; statics强电干扰: high voltage interference; power interference强静电干扰: heavy statics; heavystatics强天电干扰: heavy statics射电干扰: radio interference射电干扰仪: radio interferometer天电干扰: atmospheric disturbances; atmospheric interference; atmospherics; sferics; sky electrical interference; static disturbance; statics; strays; x's天电干扰声: grinders无线电干扰: invisible shield; radio disturbance; radio jamming; radio noise; radio-influence; radio-interference; radionoise; ri radio interference【无线电】天电干扰。: atmospheric disturbance不受静电干扰: static free不受天电干扰: static-free降雪天电干扰: snow static抗静电干扰的: antistatic人为静电干扰: man made static水气静电干扰: precipitation interference天电干扰电平: static level天电干扰哼声: static hum无天电干扰的: static-free无线电干扰场: radio interference field