大中型水轮发电机静止整流励磁系统及装置技术条件 DLT 583-2006e.pdf

DL/T583-2006thyristor rectifier to rectify the electric power from AC power source into DC power.It includes the excitationtransformer,the power rectifier unit,the excitation regulator and field flashing,de-excitation,protection andmonitoring devices and instruments3.3excitation regulatorThe device carrying out real-time closed-loop regulation for terminal voltage,reactive power,power factorand rotor current of a synchronous generator according to certain regulation law.3.4automatic voltage regulator(AVR)The device realizing regulation according to constant generator terminal voltage regulation mode andrealizing relevant limiting and protection functions,also referred to as automatic(regulation)channel.3.5field current regulator(FCR)The unit realizing regulation according to constant excitation current regulation mode and realizingrelevant limiting and protection functions,also referred to as manual(regulation)channel.3.6excitation system rated currentThe maximum output DC current the excitation system cansole of providing for long term continuousoperation under specified operating conditions of the excitatios ystem(This current must be greater than 1.1times the rated excitation current of the synchronous genera.e.the maximum excitation current for the longterm continuous operation of the generator,includit the variations caused by the changes of voltage,frequency and power factor of the generator).3.7excitation system rated voltageThe DC voltage at the excitation system output terminals the excitation system capable of providing whendelivering excitation system rated current under rated load conditions of continuous operation of thesynchronous generator.3.8excitation system ceiling currentThe maximum output current the excitation system can supply in specified field-forcing time3.9excitation system ceiling voltageThe average value of the rectified voltage at both terminals of the field winding,at the moment when theexcitation current reaches the predetermined ceiling current during field-forcing of the excitation system.Usethe rated excitation current as the field-forcing initial current,and the rated generator operating conditionexcitation field winding temperature(calculated as 120C)as the initial field winding temperature.3.10ratio of ceiling currentThe ratio of excitation system ceiling current to rated excitation current3.11ratio of ceiling voltageThe ratio of excitation system ceiling voltage to rated excitation voltage.2