电压调差系数对秦山核电机组间无功出力分配的影响研究

Synchronous Generator Voltage Regulation Coefficient affecting Reactive Power of Qinshan Nuclear Groups

秦山核电基地目前有9台运行核电机组,秦二厂和秦三厂的6台机组无功功率长期异常波动给机组的稳定运行带来极大隐患。从发电机励磁调差设定方面进行系统分析;阐述发电机励磁调差中调差环节的系统作用,介绍机组调差系数设定与无功功率分配之间的关系,对其调差特性进行计算和分析;并剖析并列运行机组之间无功功率分配原理,对各台机组进行并列点等效调差折算,重点分析秦山500 k V联合开关站各台机组无功波动不一致现象,针对秦二厂1、2#机组调差率设定不合理现象,提出改进意见。

There are nine operating nuclear power units in Qinshan Area, the long term reactive power abnormity fluctuate bring a large hidden trouble about the Qinshan phase Ⅱ and the Qinshan phase Ⅲ. The generator excitation reactive compensation setting is analyzed. The system function of generator excitation reactive compensation is expounded, it introduces the relationship between the reactive compensation coefficient setting of unit and the reactive power distribution, on the calculation and analysis of reactive compensation characteristics, analysis of the principle of reactive power allocation between parallel operation units, conversion of equivalent reactive compensation adjustment to the parallel point of each unit. The inconsistent phenomenon of the reactive power fluctuation of each unit in the 500 k V unite station is analyzed. Aiming at the unreasonable phenomenon of unit reactive compensation coefficient setting in Qinshan No. 1 and 2 units, the improvement suggestions are put forward.