In the dynamic model of the generator, through the research of its dynamic characteristics and control strategies, dynamic models adapted for control design of fixed speed and variable speed wind turbines are built and relevant simulation analysis means are established 發(fā)電機的動態(tài)建模部分通過研究其控制策略和動態(tài)特性,建立了適應于風力機控制設計的兩種動態(tài)模型,即定速發(fā)電機模型和變速發(fā)電機模型,確定了相應的仿真分析方法。
During unit startup and load is lower than 15 %, drum level is controlled by feedwater control valve, feedwater pump remains at minimum safety speed; when load is between 15 % and 25 %, feedwater control valve is closing at fixed speed determined by function module, main motor-operated-valve is opened automatically, control mode of drum level is transferred to feedwater pump automatically and bumplessly; when load is between 25 % and 50 %, control valve is closed fully, and main motor-operated-valve is open fully, drum level is controlled by one pump; when load is more than 50 %, first pump is kept in operation, second pump is putting into operation automatically and 在機組啟動、沖轉及機組并網(wǎng)至15%負荷階段,給水泵維持在最低安全轉速下運行,汽包水位由低負荷給水調節(jié)閥自動控制;15%至25%負荷階段,給水調節(jié)閥由函數(shù)模塊按照一定的速率自動平滑關閉,主給水電動門自動打開,汽包水位控制方式自動無擾切換為給水泵自動控制;負荷在25%至50%階段時,給水調節(jié)閥已完全關閉,主給水電動門已完全打開,水位控制已全由單臺給水泵承擔;負荷大于50%后,在第一臺給水泵運行的同時,第二臺給水泵自動無擾投入。
The main function of a governor is to monitor the speed deviation of a hydro turbine unit and convert it into the displacement deviation of the servomotor according to a specific characterisic . it is used to control the opening of the guide apparatus and to ensure the unit run steadily at fixed speed under a given load 調速器的主要功用是檢測機組轉速偏差,并將它按一定特性轉換成接力器的行程偏差,借以調整機組導水結構的開度,使機組在給定的負荷下以給定的轉速穩(wěn)定運行。